Fontana, California Weather
California lilac blooms in winter light. Day 50 of autumn. Read this microseason across nine climate regions →
Fontana weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 11:43 AM PST · Open-Meteo
- TodayNov 10Clear——85°60°—
- WednesdayNov 11Clear——86°60°+1°
- ThursdayNov 12Overcast——78°60°-8°
- FridayNov 13Light Showers43%0.08″69°58°-9°
- SaturdayNov 14Showers43%0.70″63°57°-6°
- SundayNov 15Overcast20%—68°58°+5°
- MondayNov 16Drizzle62%0.03″63°56°-5°
Air quality now AQI 41 · Good
AQI 41 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 43 now. With UV 5.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 28.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43 now. With UV 5.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 28.
- Present
- AQI 43
- UV peak
- 5.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 28
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).
When the wind is in the west, the weather is at its best.
- Moonrise
- 7:54 AM
- Moonset
- 4:59 PM
- In sign
- ♐︎ Sagittarius
California lilac blooms in winter light
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Fontana at a glance
- Today vs. normal: Today averages 73°F (high 85°F, low 60°F), 12°F above the 61°F normal for Nov 10
- Last frost: None in most years — 32°F in 41% of 1991–2020 years (NOAA station 14 km away)
- Microseason: Nov 6–10
- Planting calendar: November — plant lettuce, peas, spinach, radishes; harvest lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — Fontana
- Tue85°61°0%
- Wed86°60°0%
- Thu78°60°8%
- Fri69°58°43%
- Sat63°57°43%
- Sun68°58°20%
- Mon63°56°62%
- Tue63°54°52%
- Wed64°53°35%
- Thu62°55°35%
- Fri63°54°28%
- Sat64°53°11%
- Sun72°52°14%
- Mon75°56°16%
- Tue70°59°10%
- Wed74°56°10%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Fontana
Interactive wind and temperature map centered on Fontana — it loads in your browser. Open the full weather map.
Right now in the garden
Year-round growing
As of November 10, sowing here runs through the year. Freezes are uncommon, so there is no frost date to plan around; heat and rainfall set the calendar instead. This city's planting calendar for November: plant lettuce, peas, spinach, and radishes; harvest lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Fontana
Fontana sits in San Bernardino County, where the year’s longest day runs 14h 26m of daylight and its shortest just 9h 53m — a swing of +4h 33m 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 54 miles to the W. The nearest town Fontana tracks is Rancho Cucamonga, roughly 6 miles to the WNW.
Air quality in Fontana
Air quality in Fontana’s county has trended cleaner since 2020; its cleanest year on record was 2023 (median AQI 71). See the full air-quality history for Fontana.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
| February | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
| March | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| May | spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, summer squash |
| June | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash |
| July | lettuce, peas, tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| August | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| September | lettuce, peas, spinach, radishes, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| October | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| November | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| December | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
A year in weather
In Fontana, August runs warmest near 80°F and January coldest around 52°F, while February is the wettest month (3.4 inches) and August the driest (0.0 inches).
| Month | Mean temp | Precip |
|---|---|---|
| January | 52° | 3.3″ |
| February | 54° | 3.4″ |
| March | 57° | 3.0″ |
| April | 62° | 1.5″ |
| May | 67° | 0.5″ |
| June | 73° | 0.1″ |
| July | 79° | 0.1″ |
| August | 80° | 0.0″ |
| September | 76° | 0.1″ |
| October | 69° | 0.5″ |
| November | 59° | 1.6″ |
| December | 53° | 2.6″ |
Regional context
Similar climates Bloomington, CA, Rialto, CA, Rancho Cucamonga, CA
Fontana's climate, from modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo), pairs 52°F Januarys with 79°F Julys — a 27°F swing. About 16.7 inches of precipitation falls each year.
Fontana's moisture rides winter storm tracks: February brings 3.4 inches, while August sees only 0.0 inches in the dry warm season. That cool-season-wet pattern aligns Fontana with places like Bloomington, CA, Rialto, CA and Rancho Cucamonga, CA.
Fontana rarely sees a hard freeze — its coldest month sits near 52°F — so planting spans most of the calendar. Heat peaks in August around 80°F, which confines cool-season crops to the shoulders of summer. Fontana beds by a wall stay warmer at night.
Similar climates: Bloomington, CA, Rialto, CA, Rancho Cucamonga, CA, Jurupa Valley, CA, Muscoy, CA.
Frequently asked
- When does it freeze in Fontana?
- Most years Fontana doesn't freeze: the nearest NOAA station reached 32°F in 41% of 1991–2020 years, so Fontana has no reliable frost date.
- What is the rainy season in Fontana?
- Fontana sees its heaviest rain in February (around 3.4 inches), part of roughly 17 inches a year.
- What is the warmest month in Fontana?
- On average August tops the year in Fontana at about 80°F.
- What is the coldest month in Fontana?
- The coldest stretch in Fontana falls in January, around 52°F on average.
- When can I start a vegetable garden in Fontana?
- Any season works in Fontana: without a reliable freeze, Fontana's heat, not frost, decides when greens and tomatoes do best.
- What hardiness zone is Fontana?
- With January around 52°F, Fontana's zone reflects that minimum — the USDA ZIP map confirms Fontana's band.
- What is the 10-day forecast for Fontana?
- Fontana'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 Fontana?
- See this week's day-by-day rain chances for Fontana in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Fontana?
- Current conditions for Fontana and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Fontana forecast updated?
- The Fontana forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Fontana?
- Today's sunrise and sunset times for Fontana 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 Fontana?
- The next few days in Fontana's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Fontana sits at 34.1°N; its climate zone is hot-summer Mediterranean (Köppen approximation).
ZIP codes in Fontana
- 92331
- 92334
- 92335
- 92336
- 92337
- 92402