Weather StoryAlmanac, microseasons, and the day's weather story.

Hayward, California Weather

August begins in scorching stillness. Day 43 of summer. Read this microseason across nine climate regions →

Hayward weather forecast — hour by hour, 7-day outlook, NOAA radar

Hayward, CA
Sunday, August 2 at 7:59 AM
61
°
Clear
Feels like
62°
Humidity
87%
Wind
2 mph
Sunrise
11:13 PM
Sunset
1:15 PM
Hayward, CA
Hour by hour · 24h
24-Hour ForecastHayward, CA: 24-hour forecast. Temperatures range from 58 to 87 degrees Fahrenheit.
L 58°H 87°
Hayward, CA
7-day forecast
  1. Today
    Aug 2
    Mostly Clear
    —
    —
    87°57°—
  2. Monday
    Aug 3
    Clear
    —
    —
    91°60°+4°
  3. Tuesday
    Aug 4
    Clear
    —
    —
    84°61°-7°
  4. Wednesday
    Aug 5
    Clear
    —
    —
    81°63°-3°
  5. Thursday
    Aug 6
    Clear
    —
    —
    82°63°+1°
  6. Friday
    Aug 7
    Clear
    —
    —
    82°62°0°
  7. Saturday
    Aug 8
    Clear
    —
    —
    83°63°+1°
Hayward, CA
Next 24 hours · Cool now
HOT 90°50°73°95°12p6p12a6anow 58°high 87°low 58°
Hayward, CA
Anemometer · 24h winds · from true
NESW
From · True
ENE
073° · veering 15°
Direction
ENE
073°
Sustained
2
mph
Gust
3
mph
Peak 24h
12
avg 4 mph
Beaufort · 1 · LIGHT AIR
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 4 mph · pk 12 mph @ 4:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 136SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Hayward, CA
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1010.1
+0.2 mb in 3h · steady · 29.83 inHg
Now
1010.1
mb
3h
+0.2
mb
12h
-0.5
mb
24h
-4.2
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1010–1014
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1014.41009.51009.8
Damp, unsettled regime — wet weather lingers nearby.
Hayward, CA
Air quality
53
AQI
Moderate
→+1 in 6h

AQI 53 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.8 µg/m³ (AQI 49) with a 0.88 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
8.8μg/m³
PM 10Good
10μg/m³
NO₂Good
15μg/m³
OzoneGood
17μg/m³
UV IndexLow
0.2

What's driving it

PM × Wind × Precip

PM2.5 at 8.8 µg/m³ (AQI 49) with a 0.88 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.

PM2.5/PM10
0.88
Wind
calm
Recent rain
0h in last 6h
Pattern
stagnant smoke

Trends

Seven days of AQI and PM2.5.

Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³300
Hayward, CA
Sky cover · visibility · 24h
Cloud cover
6%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
30.6mi
UNLIMITED
75 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
14:59 UTC · Hayward, CA · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
14:59 UTC · Hayward, CA · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Hayward, CA
Satellite · infrared · animated
Hayward, CA
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Hayward, CA
Almanac · Sunday, August 2
Red sky at night, sailor's delight.
Civil dawn
5:45 AM
Sunrise
11:13 PM
Daylight
14h 02m
Sunset
1:15 PM
Civil dusk
8:46 PM
Planting note
Sow fall peas. Start kale and collard seedlings for fall.
Hayward, CA
The moon
Waning Gibbous
84% illuminated
Moonrise
9:53 PM
Moonset
10:18 AM
In sign
♓︎ Pisces
Hayward, CA
Microseason
Aug 1–5

August begins in scorching stillness

plant
Jan 159% of the yearDec 31

Read this microseason across nine climate regions →

Hayward at a glance

  • Today vs. normal: 4°F below the seasonal normal for this latitude
  • Last frost: April 2 (climatological average for this latitude)
  • Microseason: Aug 1–5
  • Planting window: Sow fall peas. Start kale and collard seedlings for fall.

ZIP codes: 94541, 94542, 94544, 94545

16-Day Forecast — Hayward

  1. Sun87°57°0%
  2. Mon91°60°0%
  3. Tue84°61°0%
  4. Wed81°63°0%
  5. Thu82°63°0%
  6. Fri82°62°0%
  7. Sat83°63°0%
  8. Sun77°64°0%
  9. Mon77°61°0%
  10. Tue75°61°0%
  11. Wed75°61°2%
  12. Thu76°61°3%
  13. Fri77°61°3%
  14. Sat73°61°0%
  15. Sun75°61°3%
  16. Mon79°60°3%

Forecast data from Open-Meteo (CC BY 4.0).

Live wind & temperature near Hayward

Right now in the garden

Peak growing season

As of August 2, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

Sun & seasons in Hayward

Hayward sits in Alameda County, where the year’s longest day runs 14h 46m of daylight and its shortest just 9h 33m — a swing of +5h 13m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.

Los Angeles, the state’s largest city, lies about 318 miles to the SE. The nearest town Hayward tracks is Fremont, roughly 9 miles to the SE.

Air quality in Hayward’s county has trended cleaner since 2020; its cleanest year on record was 2023 (median AQI 48). See the full air-quality history for Hayward.

January 1–5: New year in coastal mist.January 6–10: Hills hold the winter cold.January 11–15: Light lengthens over wet earth.January 16–20: The green pulse quickens.January 21–25: Spring green spreads inland.January 26–31: Winter's grip releases.February 1–5: Fog lifts, flowers open.February 6–10: Blooms erupt across chaparral.February 11–15: Winter blooms at their peak.February 16–20: Rivers recede, flowers spread.February 21–25: Earth warms, flowers rush upslope.February 26–28: Spring advances on cool winds.March 1–5: Grass and trees bud and break.March 6–10: Insects wake and feed.March 11–15: Blossoms crown the hillsides.March 16–20: Monarch chrysalis emergence.March 21–25: Light overtakes dark at equinox.March 26–31: California poppy ablaze.April 1–5: Spring rain feeds the seedlings.April 6–10: Warblers flood the understory.April 11–15: Allen's hummingbirds in courtship dives.April 16–20: Coastal fog settles; sun breaks midday.April 21–25: Oak canopies full and green.April 26–30: Chaparral awakens after spring rains.May 1–5: Coastal wildflowers at their peak.May 6–10: Gray whales complete their migration north.May 11–15: Redwood coast in cool shade.May 16–20: Fog and sun in daily rhythm.May 21–25: Summer approaches; hills turn gold.May 26–31: Dry season begins; tule fog in valleys.June 1–5: Coastal fog thickens at dawn.June 6–10: California poppies fade as heat rises.June 11–15: Summer solstice light stretched thin.June 16–20: Bay laurel fragrance sweetens shade.June 21–25: Longest daylight, driest air.June 26–30: Fog banks mask the turning tide.July 1–5: Summer heat deepens across the valleys.July 6–10: Warm winds drive dryness inland.July 11–15: Pacific high settles in firmly.July 16–20: Young hawks take to the thermals.July 21–25: Peak fire season, peak heat.July 26–31: Chaparral poised for ignition.August 1–5: August begins in scorching stillness.August 6–10: Autumn's first cool breath arrives.August 11–15: Cool winds signal the turning year.August 16–20: Evening cicada chorus.August 21–25: Marine layer descent.August 26–31: Monarch staging begins.September 1–5: Fire season intensity.September 6–10: Dew on drying grasses.September 11–15: Raptor passage begins.September 16–20: Equinox descent.September 21–25: Ceanothus blooms again.September 26–30: Insects retreat below.October 1–5: Creeks begin to whisper.October 6–10: Santa Ana wind season.October 11–15: Wildflower anticipation.October 16–20: Chaparral embers glow.October 21–25: First atmospheric river looms.October 26–31: Rains return at last.November 1–5: Coast live oak leaves turn amber.November 6–10: California lilac blooms in winter light.November 11–15: First rain greens the chaparral.November 16–20: Coastal fog thickens as storms approach.November 21–25: Thanksgiving rains swell the valleys.November 26–30: Autumn's last breath yields to winter.December 1–5: December arrives, storms accelerate.December 6–10: Winter solstice season intensifies.December 11–15: Deep winter: rivers at flood stage.December 16–20: Winter salmon runs peak in northern rivers.December 21–25: Winter solstice: the sun turns.December 26–31: Year's end in wind and rain.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · August 1–5

August begins in scorching stillness

Calm days dominate early August; temperatures peak; the entire ecosystem is in survival mode.

Day 214 of 365 · Wedge 43 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
Aprillettuce, peas, spinach, radishes—
Maylettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
August—tomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
November——
December——

A year in weather

Hayward's warmest month is July (~69°F mean) and its coldest is January (~49°F). Rainfall peaks in January (3.4 inches) and bottoms out in July (0.0 inches).

MonthMean tempPrecipRainy days
January49°3.4″13
February51°3.3″12
March53°2.7″13
April57°1.4″9
May63°0.5″4
June67°0.0″1
July69°0.0″1
August69°0.0″1
September69°0.1″1
October64°0.5″4
November55°2.1″8
December49°3.0″12

Regional context

In Hayward, NOAA NCEI 1991-2020 normals put January near 49°F and July near 69°F — a 21°F seasonal arc — with about 17.2 inches of precipitation over 79 rainy or snowy days.

Hayward's moisture rides winter storm tracks: January brings 3.4 inches over 13.3 wet days, while July sees only 0.0 inches across 0.9 days in the dry warm season. That groups Hayward with places like Fairview, CA, Cherryland, CA and Union City, CA on the same cool-season storm track.

Hard freezes are rare in Hayward: the coldest month averages 49°F, so Hayward's growing window runs most of the year. July is the hottest stretch near 69°F, pushing cool-season crops to the milder shoulder months. Hayward's coastal lots stay 4-7°F milder overnight than Hayward's inland parcels.

Similar climates: Fairview, CA, Cherryland, CA, Union City, CA, San Lorenzo, CA, Ashland, CA.

Naturalist notes

Late May brings the arrival of migrating Black-chinned Hummingbirds to the region's gardens and wildflower patches.

California poppies reach their peak bloom in early June, carpeting hillsides with orange flowers before summer heat sets in.

Frequently asked

When does it freeze in Hayward?
Hayward's last spring frost lands near mid-April, and in Hayward the first fall frost follows around mid-November.
What is the rainy season in Hayward?
Hayward sees its heaviest rain in January (around 3.4 inches), part of roughly 17 inches a year.
What is the warmest month in Hayward?
July is Hayward's warmest month, averaging about 69°F.
What is the coldest month in Hayward?
Hayward bottoms out in January, with a mean near 49°F.
When can I start a vegetable garden in Hayward?
Hayward's last frost (mid-April) cues hardy greens; in Hayward, hold heat-lovers two weeks past.
How many rainy days does Hayward get?
Hayward averages about 79 days with measurable rain or snow each year.
What hardiness zone is Hayward?
Hayward sits in the USDA zone set by January lows near 49°F; the USDA ZIP tool gives the band.
What is the 10-day forecast for Hayward?
Hayward's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Hayward?
See this week's day-by-day rain chances for Hayward in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Hayward?
Current conditions for Hayward and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Hayward forecast updated?
The Hayward forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Hayward?
Today's sunrise and sunset times for Hayward are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Hayward?
The next few days in Hayward's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Hayward, California has a hot-summer Mediterranean climate: January averages roughly 49°F, July about 69°F, 20°F between them.

In a typical year Hayward records about 17 inches of precipitation on around 79 days.

Latitude 37.6°N gives Hayward its 20°F swing, and with it the rhythm of Hayward's growing season.

All cities in California →

San Francisco, CA weather →

ZIP codes in Hayward

  • 94541
  • 94542
  • 94544
  • 94545
  • 94587
  • 94540
  • 94543
  • 94557

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.