Los Altos, Texas Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Los Altos weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast19%—91°77°—
- FridayJun 5Drizzle25%0.05″90°73°-1°
- SaturdayJun 6Overcast20%—100°74°+10°
- SundayJun 7Overcast——101°78°+1°
- MondayJun 8Overcast18%—100°79°-1°
- TuesdayJun 9Overcast——96°77°-4°
- WednesdayJun 10Mostly Clear——100°75°+4°
Ozone at AQI 31 — peak already passed at 1 PM under partly cloudy skies. AQI up 7 over the last 6 hours (gradual rise). Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 31 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 31
- UV peak
- 1.1 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 31
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 4:33 AM
- Moonset
- 3:13 PM
- In sign
- ♒︎ Aquarius
Fireflies pulse through the magnolias
Los Altos at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: January 31 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, 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.
SPC Convective Outlook
Storm Prediction Center — Los Altos
SPC has placed Los Altos in the General Thunderstorms category for severe thunderstorms today.
- 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. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | lettuce, peas, spinach, radishes | — |
| March | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| April | tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | — | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
Los Altos's warmest month is August (~89°F mean) and its coldest is January (~58°F). Rainfall peaks in September (3.9 inches) and bottoms out in February (0.7 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 58° | 0.8″ | 2 |
| February | 63° | 0.7″ | 2 |
| March | 70° | 1.3″ | 2 |
| April | 77° | 1.3″ | 2 |
| May | 83° | 2.8″ | 3 |
| June | 88° | 1.8″ | 3 |
| July | 89° | 1.9″ | 3 |
| August | 89° | 1.6″ | 3 |
| September | 84° | 3.9″ | 5 |
| October | 77° | 1.7″ | 2 |
| November | 66° | 1.0″ | 2 |
| December | 59° | 1.1″ | 2 |
Frequently asked
- When does it freeze in Los Altos?
- Los Altos's last spring frost typically falls around mid-February, and the first fall frost arrives around mid-December.
- What is the rainy season in Los Altos?
- September is the wettest month with about 3.9 inches of rain on average; the city receives roughly 20 inches annually.
- What is the warmest month in Los Altos?
- August is typically warmest, averaging about 89°F.
- What is the coldest month in Los Altos?
- January is typically coldest, averaging about 58°F.
- When can I start a vegetable garden in Los Altos?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-February); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Los Altos get?
- Los Altos averages about 30 rainy days per year.
- What hardiness zone is Los Altos?
- Los Altos's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Los Altos, Texas sits in a humid subtropical climate zone. January means hover near 58°F while July averages 89°F — a 31°F seasonal swing.
Across the year, Los Altos receives about 20 inches of precipitation spread over roughly 30 rainy days.
The rhythm of the year is set by latitude (27.5°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.