University of California-Merced, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
University of California-Merced weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast18%—94°69°—
- MondayJul 6Overcast——93°64°-1°
- TuesdayJul 7Mostly Clear——100°56°+7°
- WednesdayJul 8Clear——103°56°+3°
- ThursdayJul 9Clear——107°60°+4°
- FridayJul 10Clear——109°62°+2°
- SaturdayJul 11Overcast——111°64°+2°
AQI 35 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±4 points). PM2.5 at 9.7 µg/m³ (AQI 52) with a 0.71 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
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 9.7 µg/m³ (AQI 52) with a 0.71 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.71
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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
- 11:20 PM
- Moonset
- 11:20 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
University of California-Merced at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: March 31 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — University of California-Merced
- Sun94°69°18%
- Mon93°64°0%
- Tue100°56°0%
- Wed103°56°0%
- Thu107°60°0%
- Fri109°62°0%
- Sat111°64°0%
- Sun110°67°2%
- Mon114°74°3%
- Tue115°76°7%
- Wed95°74°1%
- Thu106°69°3%
- Fri112°74°3%
- Sat119°76°10%
- Sun118°80°6%
- Mon113°75°3%
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 | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
In University of California-Merced, July runs warmest near 78°F and December coldest around 46°F, while January is the wettest month (2.7 inches) and August the driest (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 46° | 2.7″ | 6 |
| February | 50° | 2.2″ | 6 |
| March | 54° | 1.9″ | 5 |
| April | 59° | 1.0″ | 3 |
| May | 67° | 0.6″ | 2 |
| June | 73° | 0.1″ | 0 |
| July | 78° | 0.0″ | 0 |
| August | 77° | 0.0″ | 0 |
| September | 73° | 0.1″ | 0 |
| October | 64° | 0.7″ | 2 |
| November | 53° | 1.2″ | 3 |
| December | 46° | 2.0″ | 5 |
Frequently asked
- When does it freeze in University of California-Merced?
- Frost typically leaves University of California-Merced by mid-April and returns to University of California-Merced near mid-November.
- What is the rainy season in University of California-Merced?
- January is the wettest month in University of California-Merced, about 2.7 inches on average; the year totals roughly 13 inches.
- What is the warmest month in University of California-Merced?
- July is University of California-Merced's warmest month, averaging about 78°F.
- What is the coldest month in University of California-Merced?
- University of California-Merced bottoms out in December, with a mean near 46°F.
- When can I start a vegetable garden in University of California-Merced?
- Time tomatoes in University of California-Merced for two weeks after mid-April; peas and greens start at University of California-Merced's frost line.
- How many rainy days does University of California-Merced get?
- University of California-Merced records around 32 days of measurable precipitation annually.
- What hardiness zone is University of California-Merced?
- University of California-Merced's USDA zone comes from its December mean (46°F); enter the ZIP on the USDA lookup for the number.
- What is the 10-day forecast for University of California-Merced?
- University of California-Merced'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 University of California-Merced?
- See this week's day-by-day rain chances for University of California-Merced in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in University of California-Merced?
- Current conditions for University of California-Merced and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the University of California-Merced forecast updated?
- The University of California-Merced forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in University of California-Merced?
- Today's sunrise and sunset times for University of California-Merced 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 University of California-Merced?
- The next few days in University of California-Merced's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
University of California-Merced's hot-summer Mediterranean climate in California pairs 46°F Januarys with 78°F Julys, 32°F apart across the seasons.
In a typical year University of California-Merced records about 13 inches of precipitation on around 32 days.
At 37.4°N, University of California-Merced's 32°F summer-to-winter swing sets when University of California-Merced's gardens wake and when frost returns.
ZIP codes in University of California-Merced
- 95340