Mesa, Arizona Weather
Thunder finally silent. Day 93 of summer. Read this microseason across nine climate regions →
Mesa weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 1:50 AM MST · Open-Meteo
- TodaySep 21Overcast——100°77°—
- TuesdaySep 22Clear——97°74°-3°
- WednesdaySep 23Drizzle——95°81°-2°
- ThursdaySep 24Showers34%0.05″99°75°+4°
- FridaySep 25Clear——95°79°-4°
- SaturdaySep 26Clear——100°86°+5°
- SundaySep 27Light Drizzle12%—99°88°-1°
Air quality now AQI 24 · Good
AQI 24 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 5.4 µg/m³, PM10 at 14.0 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 5.4 µg/m³, PM10 at 14.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.39
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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).
September dries up ditches or breaks down bridges.
- Moonrise
- 3:45 PM
- Moonset
- 1:11 AM
- In sign
- ♑︎ Capricorn
Thunder finally silent
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Mesa at a glance
- Today vs. normal: Today averages 89°F (high 100°F, low 77°F), 5°F above the 84°F normal for Sep 21
- Last frost: February 1 (1991–2020 median, NOAA station 7 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant beans, squash, fall brassicas, carrots; harvest summer squash, winter squash
15-Day Forecast — Mesa
- Mon100°77°3%
- Tue97°74°5%
- Wed95°81°9%
- Thu99°75°34%
- Fri95°79°9%
- Sat100°86°4%
- Sun99°88°12%
- Mon99°85°24%
- Tue100°87°13%
- Wed97°82°10%
- Thu93°83°9%
- Fri100°86°19%
- Sat102°89°20%
- Sun98°87°16%
- Mon93°85°11%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Mesa
Interactive wind and temperature map centered on Mesa — it loads in your browser. Open the full weather map.
Right now in the garden
Peak growing season
As of September 21, the growing season is at its peak — the first frost (around December 10) is weeks away. Fall transplants go in about 10–12 weeks before the first frost, September 17 to October 1 here. This city's planting calendar for September: plant beans, squash, fall brassicas, and carrots; harvest summer squash and winter squash.
SPC Convective Outlook
Storm Prediction Center — Mesa
SPC includes Mesa in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook.
Sun & seasons in Mesa
Mesa sits in Maricopa County, where the year’s longest day runs 14h 22m of daylight and its shortest just 9h 56m — a swing of +4h 26m between the June and December solstices.
Phoenix, the state’s largest city, lies about 24 miles to the WNW. The nearest town Mesa tracks is Gilbert, roughly 7 miles to the SSW.
Air quality in Mesa
Air quality in Mesa’s county has trended cleaner since 2020; its cleanest year on record was 2023 (median AQI 72). See the full air-quality history for Mesa.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes | fall brassicas, carrots |
| February | lettuce, peas, spinach, radishes | lettuce, spinach, radishes |
| March | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| April | tomatoes, squash | lettuce, peas, spinach, summer squash |
| May | squash | tomatoes, peppers, beans, summer squash, garlic |
| June | squash | tomatoes, peppers, summer squash, winter squash |
| July | squash | tomatoes, summer squash, winter squash |
| August | tomatoes, peppers, beans, squash | summer squash, winter squash |
| September | beans, squash, fall brassicas, carrots | summer squash, winter squash |
| October | — | beans, summer squash, winter squash |
| November | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| December | — | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
A year in weather
The year in Mesa tops out in July (~92°F) and dips lowest in December (~53°F), with February wettest at 1.5 inches and June driest at 0.1 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 54° | 1.4″ | 2 |
| February | 56° | 1.5″ | 3 |
| March | 62° | 1.3″ | 1 |
| April | 69° | 0.4″ | 1 |
| May | 78° | 0.2″ | 1 |
| June | 87° | 0.1″ | 0 |
| July | 92° | 1.2″ | 2 |
| August | 92° | 1.3″ | 3 |
| September | 86° | 1.1″ | 2 |
| October | 74° | 0.6″ | 1 |
| November | 62° | 0.8″ | 1 |
| December | 53° | 1.1″ | 3 |
Regional context
Similar climates Gilbert, AZ, Apache Junction, AZ, Chandler, AZ
Per NOAA NCEI 1991-2020 normals, Mesa runs from a 54°F January mean to 92°F in July, a 38°F seasonal spread, with near 10.8 inches of precipitation across about 20 wet days.
Mesa's moisture rides winter storm tracks: February brings 1.5 inches over 2.6 wet days, while June sees only 0.1 inches across 0.2 days in the dry warm season. That groups Mesa with places like Gilbert, AZ, Apache Junction, AZ and Chandler, AZ on the same cool-season storm track.
Once Mesa passes February 1, freezes fade and Mesa's beds take lettuce, chard, arugula, and mustard greens. Mesa's heat-lovers — tomatoes, peppers, squash — hold off until Mesa's frost risk clears, 10-14 days on. The season ends by December 10 in Mesa, once hard frosts set back in. Open lawns in Mesa whiten first when frost returns.
Similar climates: Gilbert, AZ, Apache Junction, AZ, Chandler, AZ, Queen Creek, AZ, Tempe, AZ.
Frequently asked
- When does it freeze in Mesa?
- Frost typically leaves Mesa by February 1 and returns to Mesa near December 10.
- What is the rainy season in Mesa?
- Rainfall in Mesa peaks in February near 1.5 inches, out of about 11 inches annually.
- What is the warmest month in Mesa?
- Mesa peaks in July, when the mean runs near 92°F.
- What is the coldest month in Mesa?
- December is Mesa's coldest month, averaging about 53°F.
- When can I start a vegetable garden in Mesa?
- Around February 1, start frost-hardy crops in Mesa; tomatoes and basil belong a fortnight later.
- How many rainy days does Mesa get?
- Expect roughly 20 wet days a year in Mesa.
- What hardiness zone is Mesa?
- With December around 53°F, Mesa's zone reflects that minimum — the USDA ZIP map confirms Mesa's band.
- What is the 10-day forecast for Mesa?
- Mesa'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 Mesa?
- See this week's day-by-day rain chances for Mesa in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Mesa?
- Current conditions for Mesa and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Mesa forecast updated?
- The Mesa forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Mesa?
- Today's sunrise and sunset times for Mesa 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 Mesa?
- The next few days in Mesa's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Mesa sits at 33.4°N; its climate zone is hot desert (Köppen approximation).
ZIP codes in Mesa
- 85201
- 85202
- 85203
- 85204
- 85205
- 85206
- 85207
- 85208
- 85209
- 85210
- 85211
- 85212
- 85213
- 85214
- 85215
- 85216
- 85274
- 85275
- 85277