Climate averages 1991–2020
Folsom weather
in July.
A hot, very dry month: the warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Folsom: daytime highs average 33.7°C and nights cool to about 17.1°C. By daytime temperature it is the warmest month of the year.
Rain is very rare: less than 1 mm falls in a typical July (the driest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 35 min on an average July day.
The nearest other city in this atlas is Citrus Heights (10 km away). In July its highs average 33.9°C, about as warm as Folsom, with almost no rain (under 1 mm).
Among the 498 cities listed in the United States, Folsom ranks joint 78th of 498 for the warmest July highs and joint 4th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Folsom is 3.5°C warmer than that mean.
From July to August, average highs fall by 0.7°C to 33.1°C, and monthly rainfall rises from under 1 mm to 1.1 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Folsom climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 13.4°C3.8°C | 3.8°C | 142 | 10.1 | 9.810 h |
| February | 15.2°C4.8°C | 4.8°C | 136 | 9.8 | 10.711 h |
| March | 17.6°C6.5°C | 6.5°C | 120 | 9.6 | 11.912 h |
| April | 20.8°C8.4°C | 8.4°C | 57 | 6.4 | 13.213 h |
| May | 25.8°C11.7°C | 11.7°C | 33 | 4.5 | 14.314 h |
| June | 30.9°C15.0°C | 15.0°C | 6.8 | 1.2 | 14.815 h |
| July, selected | 33.7°C17.1°C | 17.1°C | 0.3 | 0.1 | 14.615 h |
| August | 33.1°C16.9°C | 16.9°C | 1.1 | 0.1 | 13.714 h |
| September | 30.7°C15.3°C | 15.3°C | 4.2 | 0.8 | 12.512 h |
| October | 24.9°C11.5°C | 11.5°C | 41 | 3.3 | 11.211 h |
| November | 17.5°C6.7°C | 6.7°C | 77 | 6.9 | 10.110 h |
| December | 13.1°C3.8°C | 3.8°C | 143 | 10.4 | 9.510 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Citrus Heights in JulyUnited States · 10 kmHigh 33.9°C · Low 17.0°C · 0.3 mm rain
- Roseville in JulyUnited States · 13 kmHigh 34.1°C · Low 17.4°C · 0.3 mm rain
- Rancho Cordova in JulyUnited States · 15 kmHigh 33.7°C · Low 16.7°C · 0.4 mm rain
- Arden-Arcade in JulyUnited States · 19 kmHigh 33.9°C · Low 16.6°C · 0.4 mm rain
- Sacramento in JulyUnited States · 30 kmHigh 34.1°C · Low 16.5°C · 0.4 mm rain
- Elk Grove in JulyUnited States · 34 kmHigh 32.7°C · Low 15.8°C · 0.4 mm rain
- Vacaville in JulyUnited States · 79 kmHigh 32.4°C · Low 15.7°C · 0.4 mm rain
- Stockton in JulyUnited States · 81 kmHigh 32.8°C · Low 15.9°C · 0.2 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Folsom) is explained once on the Folsom year overview and on the Sources, method and limits page.
Roseville and Citrus Heights lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.