June
June · September · May
United States · 1991–2020
June leads for comfortable weather in Alturas: typically 26.1°C by day, 4.7°C at night, with 17 mm of rain. Based on measured 1991–2020 NOAA station history.
June · September · May
July · August · June
May · October · June
The weakest month is January, scoring 5 against June’s 74 — days reach only 6.7°C, 17° below the 24°C the score treats as ideal, and nights drop to -7.7°C.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 6.7°C | -7.7°C | 28 mm | 6.2 | 9 h 29 | 5 | Strong coverage |
| February | 8.6°C | -5.9°C | 25 mm | 6.1 | 10 h 32 | 9 | Strong coverage |
| March | 12.1°C | -3.7°C | 34 mm | 6.9 | 11 h 48 | 24 | Strong coverage |
| April | 15.1°C | -1.9°C | 31 mm | 7.3 | 13 h 16 | 36 | Strong coverage |
| May | 20.6°C | 1.7°C | 38 mm | 6.4 | 14 h 29 | 61 | Strong coverage |
| June | 26.1°C | 4.7°C | 17 mm | 3.7 | 15 h 10 | 74 | Strong coverage |
| July | 32°C | 7.3°C | 6 mm | 1.4 | 14 h 54 | 60 | Strong coverage |
| August | 31.3°C | 5.7°C | 8 mm | 1.4 | 13 h 50 | 59 | Strong coverage |
| September | 27.2°C | 2.4°C | 10 mm | 2 | 12 h 25 | 67 | Strong coverage |
| October | 19.3°C | -2°C | 21 mm | 3.6 | 11 h 01 | 53 | Strong coverage |
| November | 11°C | -4.8°C | 32 mm | 6.1 | 9 h 47 | 19 | Strong coverage |
| December | 5.6°C | -7.9°C | 31 mm | 6.4 | 9 h 11 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C1 Jan 1918 | -35.6°C15 Jan 1917 | 54 mm15 Jan 1936 | 114 mm1909 · driest 3 mm in 1961 | 100 |
| February | 23.9°C12 Feb 1934 | -36.1°C5 Feb 1989 | 33 mm18 Feb 1986 | 129 mm1986 · driest 1 mm in 2018 | 100 |
| March | 27.8°C18 Mar 1934 | -31.7°C1 Mar 1917 | 51 mm8 Mar 1986 | 105 mm1907 · driest 3 mm in 1956 | 99 |
| April | 30.6°C24 Apr 1910 | -13.9°C5 Apr 1997 | 41 mm29 Apr 1995 | 83 mm1995 · driest 3 mm in 1977 | 101 |
| May | 36.7°C30 May 1910 | -11.7°C3 May 2008 | 40 mm17 May 1945 | 114 mm1949 · driest 0 mm in 2001 | 101 |
| June | 38.9°C17 Jun 1961 | -6.1°C18 Jun 1973 | 35 mm6 Jun 1934 | 86 mm1952 · driest 0 mm in 1973 | 102 |
| July | 42.2°C8 Jul 2007 | -2.2°C18 Jul 1993 | 51 mm23 Jul 1913 | 76 mm1913 · driest 0 mm in 1947 | 102 |
| August | 41.1°C4 Aug 1961 | -4.4°C31 Aug 1908 | 27 mm2 Aug 1965 | 76 mm1965 · driest 0 mm in 1910 | 101 |
| September | 41.1°C4 Sep 1955 | -9.4°C30 Sep 1950 | 25 mm26 Sep 1998 | 56 mm1998 · driest 0 mm in 1932 | 99 |
| October | 33.9°C15 Oct 1961 | -17.2°C31 Oct 2002 | 45 mm13 Oct 1962 | 157 mm1962 · driest 0 mm in 1976 | 99 |
| November | 28.3°C21 Nov 2005 | -27.2°C12 Nov 1985 | 34 mm19 Nov 1946 | 98 mm1998 · driest 0 mm in 1933 | 101 |
| December | 21.7°C4 Dec 1939 | -36.7°C9 Dec 1972 | 89 mm11 Dec 1937 | 144 mm1937 · driest 1 mm in 1976 | 96 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | <1 | 2 |
| February | 0 | 0 | 22 | <1 | <1 |
| March | <1 | 0 | 23 | <1 | <1 |
| April | 2 | 0 | 19 | <1 | <1 |
| May | 7 | 2 | 9 | 1 | <1 |
| June | 16 | 8 | 3 | <1 | <1 |
| July | 25 | 19 | <1 | <1 | 0 |
| August | 25 | 18 | <1 | <1 | 0 |
| September | 19 | 9 | 7 | <1 | 0 |
| October | 5 | <1 | 19 | <1 | <1 |
| November | 0 | 0 | 22 | <1 | <1 |
| December | 0 | 0 | 24 | <1 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 23% | 3% | 27% | 1.7–8.8°C |
| February | <1% | 23% | 2% | 25% | 4.2–11.1°C |
| March | 8% | 22% | 2% | 24% | 7.7–14.9°C |
| April | 26% | 20% | 2% | 19% | 11.6–18.8°C |
| May | 51% | 19% | 3% | 21% | 17.0–24.1°C |
| June | 78% | 12% | 2% | 9% | 22.1–28.1°C |
| July | 95% | 5% | <1% | 2% | 28.9–34.0°C |
| August | 94% | 5% | <1% | 2% | 28.3–32.8°C |
| September | 84% | 8% | 1% | 7% | 23.9–29.1°C |
| October | 52% | 13% | 2% | 11% | 16.1–23.5°C |
| November | 8% | 21% | 3% | 23% | 7.8–14.8°C |
| December | <1% | 23% | 2% | 24% | 3.3–9.5°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