September
September · October · May
United States · 1991–2020
September leads for comfortable weather in Ashlock: typically 28.5°C by day, 13.7°C at night, with 81 mm of rain. Based on measured 1991–2020 NOAA station history.
September · October · May
August · September · July
October · April · May
The weakest month is January, scoring 5 against September’s 74 — days reach only 8.9°C, 15° below the 24°C the score treats as ideal, and nights drop to -3.9°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 | 8.9°C | -3.9°C | 110 mm | 7.4 | 9 h 54 | 5 | Good coverage |
| February | 11.5°C | -2.2°C | 100 mm | 7.6 | 10 h 47 | 15 | Good coverage |
| March | 16.3°C | 0.9°C | 126 mm | 9.1 | 11 h 51 | 31 | Good coverage |
| April | 21.7°C | 5.4°C | 131 mm | 9.5 | 13 h 05 | 56 | Good coverage |
| May | 26.1°C | 11.3°C | 122 mm | 8.9 | 14 h 06 | 69 | Good coverage |
| June | 29.9°C | 16.2°C | 122 mm | 8.9 | 14 h 39 | 61 | Good coverage |
| July | 31.3°C | 18.6°C | 135 mm | 8.1 | 14 h 26 | 51 | Good coverage |
| August | 31.3°C | 17.8°C | 100 mm | 5.6 | 13 h 33 | 59 | Good coverage |
| September | 28.5°C | 13.7°C | 81 mm | 5.7 | 12 h 22 | 74 | Good coverage |
| October | 23°C | 6.4°C | 77 mm | 5.8 | 11 h 11 | 73 | Good coverage |
| November | 16.3°C | 1.3°C | 104 mm | 7.3 | 10 h 10 | 36 | Good coverage |
| December | 10.1°C | -2.4°C | 113 mm | 7.2 | 9 h 40 | 8 | Good coverage |
What has changed
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.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 24.4°C25 Jan 1972 | -28.9°C21 Jan 1985 | 72 mm23 Jan 2006 | 216 mm1949 · driest 11 mm in 1986 | 43 |
| February | 27.8°C24 Feb 1996 | -23.9°C6 Feb 1996 | 119 mm18 Feb 2003 | 228 mm2003 · driest 2 mm in 2015 | 42 |
| March | 31.7°C21 Mar 2012 | -17.8°C3 Mar 1980 | 100 mm18 Mar 2002 | 255 mm1997 · driest 20 mm in 1986 | 45 |
| April | 32.8°C28 Apr 1986 | -7.8°C9 Apr 2007 | 76 mm22 Apr 1984 | 233 mm1998 · driest 23 mm in 1976 | 42 |
| May | 34.4°C29 May 2012 | -2.2°C19 May 2016 | 102 mm7 May 1984 | 238 mm1983 · driest 19 mm in 2019 | 43 |
| June | 41.1°C30 Jun 2012 | 1.1°C1 Jun 2020 | 136 mm16 Jun 1949 | 291 mm1949 · driest 10 mm in 2020 | 45 |
| July | 42.8°C1 Jul 2012 | 9.4°C16 Jul 2001 | 96 mm31 Jul 1982 | 248 mm2015 · driest 12 mm in 2019 | 40 |
| August | 38.9°C22 Aug 1983 | 5.6°C29 Aug 1986 | 117 mm25 Aug 1999 | 188 mm2004 · driest 2 mm in 2007 | 41 |
| September | 37.8°C10 Sep 1980 | 0.0°C25 Sep 1983 | 127 mm24 Sep 1972 | 242 mm1979 · driest 0 mm in 2019 | 44 |
| October | 36.1°C2 Oct 2019 | -6.7°C28 Oct 2005 | 136 mm17 Oct 1975 | 195 mm1975 · driest 5 mm in 1977 | 40 |
| November | 31.1°C2 Nov 2016 | -15.0°C30 Nov 1976 | 119 mm27 Nov 1973 | 231 mm1973 · driest 9 mm in 2012 | 41 |
| December | 26.7°C4 Dec 1982 | -21.1°C25 Dec 1983 | 104 mm4 Dec 1978 | 280 mm1978 · driest 16 mm in 2006 | 37 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 17 | 3 | <1 |
| February | <1 | 0 | 14 | 2 | <1 |
| March | 3 | <1 | 12 | 3 | <1 |
| April | 8 | 1 | 4 | 3 | 0 |
| May | 15 | 5 | 0 | 3 | 0 |
| June | 20 | 12 | 0 | 3 | 0 |
| July | 22 | 16 | 0 | 3 | 0 |
| August | 22 | 17 | 0 | 2 | 0 |
| September | 17 | 9 | 0 | 2 | 0 |
| October | 9 | 2 | 3 | 2 | 0 |
| November | 2 | 0 | 11 | 3 | 0 |
| December | <1 | 0 | 15 | 3 | <1 |
The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 73); on 2011–2025 it is September (83). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 3% | 29% | 13% | 32% | 4.2–12.5°C |
| February | 8% | 31% | 12% | 34% | 6.7–14.1°C |
| March | 23% | 31% | 14% | 38% | 12.9–19.8°C |
| April | 43% | 31% | 13% | 34% | 19.1–24.4°C |
| May | 63% | 30% | 14% | 36% | 23.8–28.3°C |
| June | 70% | 29% | 13% | 34% | 28.2–31.3°C |
| July | 70% | 28% | 14% | 27% | 29.4–33.0°C |
| August | 78% | 25% | 11% | 26% | 29.8–32.6°C |
| September | 75% | 22% | 9% | 18% | 25.8–30.9°C |
| October | 59% | 20% | 10% | 16% | 20.6–25.9°C |
| November | 24% | 25% | 11% | 23% | 12.8–20.0°C |
| December | 4% | 28% | 13% | 33% | 6.8–13.4°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