Thermal, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Thermal weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Mostly Clear——110°84°—
- MondayJul 6Clear——110°80°0°
- TuesdayJul 7Clear——110°84°0°
- WednesdayJul 8Clear——111°83°+1°
- ThursdayJul 9Clear——113°83°+2°
- FridayJul 10Overcast——109°80°-4°
- SaturdayJul 11Overcast——107°82°-2°
AQI 43 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 6.6 µg/m³, PM10 at 17.6 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
Ozone × UV × Sky
Ozone at AQI 31 now. With UV 12 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 48 around 1 PM.
- Present
- AQI 31
- UV peak
- 11.7 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 48
PM × Wind × Precip
PM2.5 at 6.6 µg/m³, PM10 at 17.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.37
- Wind
- calm
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:00 PM
- Moonset
- 11:03 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Thermal at a glance
- Today vs. normal: 28°F above the seasonal normal for this latitude
- Last frost: March 9 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 92274
16-Day Forecast — Thermal
- Sun110°84°0%
- Mon110°80°0%
- Tue110°84°0%
- Wed111°83°0%
- Thu113°83°0%
- Fri109°80°0%
- Sat107°82°1%
- Sun106°82°3%
- Mon113°89°10%
- Tue107°88°9%
- Wed109°89°9%
- Thu115°91°10%
- Fri119°94°11%
- Sat113°94°0%
- Sun113°90°6%
- Mon116°93°7%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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.
Microseason · July 1–5
Summer heat deepens across the valleys
Inland temperatures exceed 95°F regularly; fire danger reaches moderate to high across most of the region.
Day 186 of 365 · Wedge 37 of 72
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | 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
In Thermal, July runs warmest near 94°F and December coldest around 57°F, while January is the wettest month (0.7 inches) and June the driest (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 59° | 0.7″ | 2 |
| February | 62° | 0.6″ | 1 |
| March | 69° | 0.3″ | 1 |
| April | 75° | 0.1″ | 0 |
| May | 81° | 0.0″ | 0 |
| June | 89° | 0.0″ | 0 |
| July | 94° | 0.1″ | 0 |
| August | 94° | 0.3″ | 0 |
| September | 89° | 0.1″ | 0 |
| October | 78° | 0.1″ | 0 |
| November | 66° | 0.2″ | 0 |
| December | 57° | 0.5″ | 1 |
Frequently asked
- When does it freeze in Thermal?
- Thermal's last spring frost lands near mid-March, and in Thermal the first fall frost follows around mid-December.
- What is the rainy season in Thermal?
- January is the wettest month in Thermal, about 0.7 inches on average; the year totals roughly 3 inches.
- What is the warmest month in Thermal?
- Thermal peaks in July, when the mean runs near 94°F.
- What is the coldest month in Thermal?
- December is Thermal's coldest month, averaging about 57°F.
- When can I start a vegetable garden in Thermal?
- In Thermal, sow peas and hardy greens around mid-March; Thermal's tomatoes and peppers wait two weeks more.
- How many rainy days does Thermal get?
- Expect roughly 6 wet days a year in Thermal.
- What hardiness zone is Thermal?
- With December around 57°F, Thermal's zone reflects that minimum — the USDA ZIP map confirms Thermal's band.
- What is the 10-day forecast for Thermal?
- Thermal'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 Thermal?
- See this week's day-by-day rain chances for Thermal in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Thermal?
- Current conditions for Thermal and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Thermal forecast updated?
- The Thermal forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Thermal?
- Today's sunrise and sunset times for Thermal 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 Thermal?
- The next few days in Thermal's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Set in a hot-summer Mediterranean zone, Thermal, California swings from 59°F in the heart of winter to 94°F at midsummer — a 35°F arc.
Thermal sees close to 3 inches of precipitation annually, falling across some 6 wet days.
Thermal's 35°F range, set by its 33.6°N position, drives frost timing and what thrives in Thermal.
ZIP codes in Thermal
- 92274