May
May · October · June
78climate match
United States · 1991–2020
Best time to visit
Redwood Valley.
May leads for comfortable weather in Redwood Valley: typically 25.5°C by day, 7.3°C at night, with 46 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortMay
Typical high25.5°C
Typical low7.3°C
Rain in May46 mm
June
June · July · August
66climate match
April
April · May · October
74climate match
The weakest month is December, scoring 5 against May’s 78 — days reach only 12.9°C, 11° below the 24°C the score treats as ideal, and 235 mm of rain falls.
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
813.7° / 1.6°
Feb
2115.9° / 2.5°
Mar
3618.4° / 3.7°
Apr
6121.1° / 4.8°
May
7825.5° / 7.3°
Jun
7130° / 9.8°
Jul
6134.5° / 12.5°
Aug
6134° / 11.5°
Sep
6332° / 9.3°
Oct
7525.6° / 6.2°
Nov
4017.5° / 3.3°
Dec
512.9° / 1.4°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 13.7°C | 1.6°C | 220 mm | 12.1 | 9 h 41 | 8 | Strong coverage |
| February | 15.9°C | 2.5°C | 191 mm | 11.3 | 10 h 39 | 21 | Strong coverage |
| March | 18.4°C | 3.7°C | 164 mm | 10.8 | 11 h 50 | 36 | Strong coverage |
| April | 21.1°C | 4.8°C | 86 mm | 7.6 | 13 h 10 | 61 | Strong coverage |
| May | 25.5°C | 7.3°C | 46 mm | 4.9 | 14 h 18 | 78 | Strong coverage |
| June | 30°C | 9.8°C | 14 mm | 1.5 | 14 h 55 | 71 | Strong coverage |
| July | 34.5°C | 12.5°C | 1 mm | 0.2 | 14 h 40 | 61 | Strong coverage |
| August | 34°C | 11.5°C | 1 mm | 0.3 | 13 h 42 | 61 | Strong coverage |
| September | 32°C | 9.3°C | 8 mm | 0.8 | 12 h 24 | 63 | Strong coverage |
| October | 25.6°C | 6.2°C | 58 mm | 3.8 | 11 h 06 | 75 | Strong coverage |
| November | 17.5°C | 3.3°C | 126 mm | 8.7 | 9 h 58 | 40 | Strong coverage |
| December | 12.9°C | 1.4°C | 235 mm | 12.4 | 9 h 25 | 5 | Strong coverage |
What has changed
Redwood Valley runs +1.3°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
+1.2
Feb
+0.7
Mar
+0.5
Apr
+1.8
May
+1.4
Jun
+1.8
Jul
+1.6
Aug
+1.8
Sep
+1.6
Oct
+1.3
Nov
+1.6
Dec
+0.7
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 27.8°C27 Jan 1984 | -10.0°C11 Jan 1949 | 144 mm16 Jan 1974 | 643 mm1970 · driest 15 mm in 1984 | 89 |
| February | 30.6°C11 Feb 1971 | -9.4°C1 Feb 1939 | 129 mm17 Feb 1986 | 543 mm1958 · driest 0 mm in 2020 | 88 |
| March | 34.4°C20 Mar 2026 | -6.7°C2 Mar 1953 | 88 mm23 Mar 1938 | 487 mm1983 · driest 1 mm in 2026 | 89 |
| April | 35.0°C21 Apr 2009 | -5.6°C5 Apr 1999 | 89 mm6 Apr 2018 | 294 mm2003 · driest 3 mm in 1985 | 88 |
| May | 39.4°C31 May 2021 | -2.2°C6 May 1964 | 89 mm18 May 2005 | 190 mm1990 · driest 0 mm in 1976 | 87 |
| June | 43.3°C15 Jun 1961 | 0.0°C6 Jun 1988 | 47 mm29 Jun 1992 | 73 mm1958 · driest 0 mm in 2014 | 87 |
| July | 45.0°C15 Jul 1972 | 3.3°C1 Jul 1963 | 38 mm8 Jul 1974 | 38 mm1974 · driest 0 mm in 2004 | 87 |
| August | 46.7°C8 Aug 1978 | 3.9°C31 Aug 1964 | 25 mm20 Aug 1997 | 60 mm1968 · driest 0 mm in 2001 | 87 |
| September | 45.0°C7 Sep 2022 | 0.6°C30 Sep 1950 | 72 mm18 Sep 1959 | 126 mm1986 · driest 0 mm in 2024 | 89 |
| October | 39.4°C3 Oct 1980 | -6.1°C29 Oct 1971 | 155 mm24 Oct 2010 | 272 mm2010 · driest 0 mm in 2002 | 89 |
| November | 33.9°C1 Nov 1966 | -7.2°C29 Nov 2015 | 128 mm21 Nov 2024 | 451 mm1973 · driest 1 mm in 1959 | 88 |
| December | 28.3°C15 Dec 1980 | -11.1°C21 Dec 1990 | 210 mm22 Dec 1964 | 662 mm1964 · driest 0 mm in 1989 | 87 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | <1 | 0 | 13 | 7 |
| February | 1 | 0 | 9 | 6 |
| March | 4 | <1 | 6 | 6 |
| April | 8 | 2 | 2 | 3 |
| May | 16 | 7 | <1 | 2 |
| June | 23 | 15 | 0 | <1 |
| July | 28 | 25 | 0 | 0 |
| August | 27 | 24 | 0 | 0 |
| September | 25 | 19 | 0 | <1 |
| October | 16 | 6 | <1 | 2 |
| November | 2 | <1 | 8 | 4 |
| December | 0 | 0 | 14 | 6 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 10% | 37% | 22% | 48% | 11.6–16.5°C |
| February | 23% | 37% | 21% | 46% | 13.3–19.2°C |
| March | 36% | 35% | 17% | 43% | 14.9–20.7°C |
| April | 56% | 23% | 9% | 27% | 18.5–24.1°C |
| May | 79% | 13% | 4% | 12% | 22.2–28.2°C |
| June | 94% | 5% | 1% | 2% | 27.6–32.9°C |
| July | 99% | <1% | <1% | 0% | 32.3–36.7°C |
| August | 98% | 2% | <1% | 1% | 31.7–36.1°C |
| September | 94% | 5% | 2% | 6% | 29.7–34.1°C |
| October | 78% | 15% | 7% | 17% | 23.1–29.0°C |
| November | 33% | 30% | 16% | 41% | 15.2–20.9°C |
| December | 7% | 37% | 21% | 46% | 10.9–16.1°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 5386943
- NOAA station
- USC00047109 · POTTER VALLEY POWERHOUSE
- Station distance
- 12.6 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 39.27°, 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.