Pomona, California Weather
California lilac blooms in winter light. Day 50 of autumn. Read this microseason across nine climate regions →
Pomona weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 11:17 AM PST · Open-Meteo
- TodayNov 10Clear——85°56°—
- WednesdayNov 11Clear——86°58°+1°
- ThursdayNov 12Overcast10%—79°59°-7°
- FridayNov 13Drizzle37%0.01″71°61°-8°
- SaturdayNov 14Showers37%0.48″67°59°-4°
- SundayNov 15Overcast20%—70°61°+3°
- MondayNov 16Drizzle57%0.04″63°58°-7°
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
- 7:55 AM
- Moonset
- 5:00 PM
- In sign
- ♐︎ Sagittarius
California lilac blooms in winter light
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Pomona at a glance
- Today vs. normal: Today averages 71°F (high 85°F, low 56°F), 10°F above the 61°F normal for Nov 10
- Last frost: January 8 (1991–2020 median, NOAA station 3 km away)
- Microseason: Nov 6–10
- Planting calendar: November — plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, winter squash
16-Day Forecast — Pomona
- Tue86°56°0%
- Wed86°58°0%
- Thu79°59°10%
- Fri71°61°37%
- Sat67°59°37%
- Sun70°61°20%
- Mon63°58°57%
- Tue66°55°48%
- Wed66°56°33%
- Thu66°58°33%
- Fri68°57°24%
- Sat70°55°10%
- Sun72°56°13%
- Mon74°59°13%
- Tue71°60°10%
- Wed72°58°11%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Pomona
Interactive wind and temperature map centered on Pomona — it loads in your browser. Open the full weather map.
Right now in the garden
Late season
As of November 10, the first frost (around December 28) is about 7 weeks away. Frost-tender plants keep producing until then. This city's planting calendar for November: plant garlic (overwinter); harvest tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Pomona
Pomona sits in Los Angeles 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 37 miles to the W. The nearest town Pomona tracks is Ontario, roughly 9 miles to the E.
Air quality in Pomona
Air quality in Pomona’s county has trended cleaner since 2020; its cleanest year on record was 2023 (median AQI 67). See the full air-quality history for Pomona.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes | lettuce, spinach, radishes, fall brassicas, carrots |
| February | — | lettuce, peas, spinach, radishes |
| March | tomatoes, peppers, beans, squash | lettuce, peas, spinach |
| April | tomatoes, peppers, beans, squash | peas |
| May | beans, squash | beans, summer squash, garlic |
| June | beans, squash | tomatoes, peppers, beans, summer squash |
| July | beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| August | beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| September | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, winter squash |
| October | beans, squash, fall brassicas, carrots | beans, summer squash, winter squash |
| November | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash |
| December | lettuce, peas, spinach, radishes, garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
A year in weather
In Pomona, August runs warmest near 78°F and December coldest around 54°F, while February is the wettest month (4.2 inches) and July the driest (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 56° | 2.9″ | 5 |
| February | 56° | 4.2″ | 6 |
| March | 60° | 2.1″ | 4 |
| April | 63° | 1.0″ | 2 |
| May | 66° | 0.2″ | 1 |
| June | 71° | 0.1″ | 0 |
| July | 76° | 0.0″ | 0 |
| August | 78° | 0.0″ | 0 |
| September | 75° | 0.0″ | 0 |
| October | 67° | 1.0″ | 3 |
| November | 60° | 0.7″ | 3 |
| December | 54° | 2.3″ | 5 |
Regional context
Similar climates Montclair, CA, La Verne, CA, San Dimas, CA
Pomona swings from 56°F in January to 76°F in July (21°F) per NOAA NCEI 1991-2020 normals; precipitation in Pomona runs about 14.5 inches on roughly 31 measurable days.
Precipitation in Pomona peaks in the cool season: February averages 4.2 inches across 6.3 storm-fed days, while July bottoms out at 0.0 inches over just 0.2 rainy days. That cool-season-wet pattern aligns Pomona with places like Montclair, CA, La Verne, CA and San Dimas, CA.
Around January 8, Pomona sheds its freezing nights — lettuce, chard, arugula, and mustard greens go into Pomona's beds. Pomona's heat-lovers — tomatoes, peppers, squash — hold off until Pomona's frost risk clears, 10-14 days on. Frost returns to Pomona near December 28, ending the tender-crop season. Open lawns in Pomona whiten first when frost returns.
Similar climates: Montclair, CA, La Verne, CA, San Dimas, CA, Diamond Bar, CA, Claremont, CA.
Frequently asked
- When does it freeze in Pomona?
- Frost typically leaves Pomona by January 8 and returns to Pomona near December 28.
- What is the rainy season in Pomona?
- Rainfall in Pomona peaks in February near 4.2 inches, out of about 14 inches annually.
- What is the warmest month in Pomona?
- August is Pomona's warmest month, averaging about 78°F.
- What is the coldest month in Pomona?
- Pomona bottoms out in December, with a mean near 54°F.
- When can I start a vegetable garden in Pomona?
- Frost-hardy sowings begin at January 8 in Pomona; warm-season starts follow two weeks on.
- How many rainy days does Pomona get?
- Expect roughly 31 wet days a year in Pomona.
- What hardiness zone is Pomona?
- Pomona's hardiness zone tracks its winter low; with December near 54°F, check the USDA ZIP map for the exact zone.
- What is the 10-day forecast for Pomona?
- Pomona'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 Pomona?
- See this week's day-by-day rain chances for Pomona in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Pomona?
- Current conditions for Pomona and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Pomona forecast updated?
- The Pomona forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Pomona?
- Today's sunrise and sunset times for Pomona 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 Pomona?
- The next few days in Pomona's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Pomona sits at 34.1°N; its climate zone is hot-summer Mediterranean (Köppen approximation).
ZIP codes in Pomona
- 91766
- 91767
- 91768
- 91769