May
May · September · June
77climate match
United States · 1991–2020
Best time to visit
Folsom.
May leads for comfortable weather in Folsom: typically 24.2°C by day, 10°C at night, with 95 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high24.2°C
Typical low10°C
Rain in May95 mm
June
June · August · July
63climate match
October
October · April · May
76climate match
The weakest month is January, scoring 5 against May’s 77 — days reach only 6.1°C, 18° below the 24°C the score treats as ideal.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
56.1° / -4.4°
Feb
57.9° / -3.8°
Mar
1812.2° / -0.4°
Apr
5319.2° / 4.7°
May
7724.2° / 10°
Jun
7028.5° / 14.9°
Jul
5330.9° / 17.9°
Aug
5929.8° / 17°
Sep
7626.3° / 13.2°
Oct
5920.2° / 7°
Nov
3214.1° / 1.6°
Dec
58.6° / -2°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 6.1°C | -4.4°C | 94 mm | 8 | 9 h 39 | 5 | Strong coverage |
| February | 7.9°C | -3.8°C | 77 mm | 7.4 | 10 h 38 | 5 | Strong coverage |
| March | 12.2°C | -0.4°C | 114 mm | 8.2 | 11 h 49 | 18 | Strong coverage |
| April | 19.2°C | 4.7°C | 93 mm | 8 | 13 h 11 | 53 | Strong coverage |
| May | 24.2°C | 10°C | 95 mm | 8.5 | 14 h 20 | 77 | Strong coverage |
| June | 28.5°C | 14.9°C | 110 mm | 8.1 | 14 h 57 | 70 | Strong coverage |
| July | 30.9°C | 17.9°C | 132 mm | 8.8 | 14 h 42 | 53 | Strong coverage |
| August | 29.8°C | 17°C | 136 mm | 7.6 | 13 h 43 | 59 | Strong coverage |
| September | 26.3°C | 13.2°C | 106 mm | 6.8 | 12 h 24 | 76 | Strong coverage |
| October | 20.2°C | 7°C | 111 mm | 7.2 | 11 h 05 | 59 | Strong coverage |
| November | 14.1°C | 1.6°C | 91 mm | 7.1 | 9 h 56 | 32 | Strong coverage |
| December | 8.6°C | -2°C | 116 mm | 9 | 9 h 23 | 5 | Strong coverage |
What has changed
Folsom runs +0.9°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
+1.3
Feb
+2.1
Mar
+1.0
Apr
+1.6
May
+0.6
Jun
+0.3
Jul
+0.8
Aug
-0.1
Sep
+0.2
Oct
+0.5
Nov
-0.1
Dec
+2.2
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.9°C15 Jan 1932 | -27.8°C22 Jan 1984 | 75 mm3 Jan 1999 | 226 mm1979 · driest 13 mm in 1955 | 123 |
| February | 26.1°C25 Feb 1930 | -31.7°C9 Feb 1934 | 97 mm11 Feb 2018 | 206 mm2018 · driest 16 mm in 2009 | 122 |
| March | 32.2°C29 Mar 1945 | -19.4°C10 Mar 1984 | 85 mm23 Mar 2024 | 223 mm1983 · driest 13 mm in 2012 | 123 |
| April | 36.1°C17 Apr 2002 | -11.1°C1 Apr 1923 | 104 mm16 Apr 1986 | 240 mm2007 · driest 11 mm in 2025 | 123 |
| May | 37.2°C23 May 1925 | -5.0°C11 May 1966 | 102 mm22 May 1939 | 246 mm1948 · driest 7 mm in 1903 | 124 |
| June | 38.9°C5 Jun 1925 | 1.1°C1 Jun 1945 | 172 mm27 Jun 1938 | 376 mm2013 · driest 12 mm in 1949 | 125 |
| July | 41.7°C2 Jul 1901 | 4.4°C1 Jul 1988 | 126 mm13 Jul 1991 | 283 mm1945 · driest 5 mm in 1955 | 124 |
| August | 40.6°C7 Aug 1918 | 2.2°C31 Aug 1976 | 182 mm2 Aug 1906 | 513 mm2011 · driest 15 mm in 1943 | 125 |
| September | 37.8°C2 Sep 1953 | -2.8°C28 Sep 1957 | 150 mm4 Sep 2012 | 280 mm1938 · driest 1 mm in 1941 | 125 |
| October | 35.0°C5 Oct 1941 | -8.3°C24 Oct 1969 | 144 mm9 Oct 1903 | 300 mm2005 · driest 0 mm in 2024 | 125 |
| November | 30.0°C1 Nov 1950 | -17.8°C26 Nov 1938 | 107 mm25 Nov 1950 | 243 mm1972 · driest 8 mm in 1917 | 124 |
| December | 24.4°C5 Dec 1982 | -23.3°C30 Dec 1917 | 115 mm18 Dec 2023 | 280 mm2023 · driest 6 mm in 1955 | 122 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | 3 | 2 |
| February | 0 | 0 | 22 | 3 | 2 |
| March | <1 | <1 | 18 | 4 | 1 |
| April | 5 | 1 | 7 | 3 | <1 |
| May | 15 | 4 | <1 | 3 | 0 |
| June | 25 | 12 | 0 | 4 | 0 |
| July | 30 | 20 | 0 | 4 | 0 |
| August | 29 | 17 | 0 | 4 | 0 |
| September | 19 | 6 | 0 | 3 | 0 |
| October | 5 | <1 | 4 | 3 | 0 |
| November | <1 | 0 | 14 | 3 | <1 |
| December | 0 | 0 | 21 | 4 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 29% | 11% | 32% | 1.9–9.2°C |
| February | 2% | 28% | 11% | 33% | 3.2–10.2°C |
| March | 10% | 30% | 12% | 35% | 8.7–15.2°C |
| April | 30% | 30% | 11% | 35% | 15.8–20.5°C |
| May | 60% | 29% | 11% | 32% | 21.6–26.0°C |
| June | 71% | 28% | 11% | 31% | 26.4–29.6°C |
| July | 72% | 28% | 12% | 30% | 29.0–32.1°C |
| August | 73% | 27% | 13% | 27% | 27.8–30.8°C |
| September | 74% | 22% | 10% | 21% | 24.1–27.7°C |
| October | 44% | 22% | 9% | 21% | 18.3–22.2°C |
| November | 11% | 24% | 10% | 23% | 11.3–16.1°C |
| December | 1% | 28% | 12% | 29% | 3.9–10.5°C |
A warm and dry day reaches 20°C with under 1 mm of rain; a wet day gets 1 mm or more; a washout gets 10 mm or more. The week column is the share of seven-day stretches in that month, across the station’s whole daily record, that contained three or more wet days — the odds a week-long trip is rained on repeatedly, counted rather than modelled. The last column is the 10th to 90th percentile of that month’s daytime average across individual years: a narrow band means the average is what you will get, a wide one means the average is a midpoint between years that felt quite different.
The evidence behind this page
Nearby, measured,
and named.
- Place identity
- GeoNames 4501808
- NOAA station
- USC00284229 · INDIAN MILLS 2 W
- Station distance
- 22.6 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 39.60°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.