September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Acup: typically 26°C by day, 12.5°C at night, with 102 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · June · July
October · April · May
The weakest month is January, scoring 5 against September’s 76 — days reach only 6.4°C, 18° below the 24°C the score treats as ideal, and nights drop to -4.7°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 | 6.4°C | -4.7°C | 108 mm | 10.6 | 9 h 46 | 5 | Good coverage |
| February | 8.3°C | -4°C | 80 mm | 9.6 | 10 h 42 | 5 | Good coverage |
| March | 13.4°C | -0.9°C | 116 mm | 11.2 | 11 h 50 | 18 | Good coverage |
| April | 20.3°C | 4.2°C | 105 mm | 11.1 | 13 h 08 | 51 | Good coverage |
| May | 24.3°C | 9.3°C | 120 mm | 10.1 | 14 h 14 | 71 | Good coverage |
| June | 28.5°C | 14.8°C | 108 mm | 9.5 | 14 h 49 | 69 | Good coverage |
| July | 30.2°C | 17.5°C | 143 mm | 9.9 | 14 h 35 | 54 | Good coverage |
| August | 29.5°C | 16.7°C | 117 mm | 7.8 | 13 h 39 | 63 | Good coverage |
| September | 26°C | 12.5°C | 102 mm | 7.2 | 12 h 23 | 76 | Good coverage |
| October | 20.3°C | 6°C | 69 mm | 8 | 11 h 08 | 62 | Good coverage |
| November | 13.7°C | 0.5°C | 93 mm | 9.2 | 10 h 02 | 26 | Good coverage |
| December | 7.7°C | -3.1°C | 81 mm | 10.7 | 9 h 30 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 25.0°C23 Jan 1999 | -28.9°C19 Jan 1994 | 74 mm2 Jan 1995 | 273 mm1995 · driest 23 mm in 1988 | 22 |
| February | 26.7°C27 Feb 2000 | -25.0°C5 Feb 1996 | 66 mm19 Feb 2000 | 197 mm2003 · driest 24 mm in 2002 | 22 |
| March | 31.1°C29 Mar 1989 | -17.8°C16 Mar 1993 | 51 mm2 Mar 1997 | 238 mm1994 · driest 37 mm in 1987 | 21 |
| April | 33.9°C29 Apr 1986 | -8.9°C11 Apr 1989 | 59 mm15 Apr 2007 | 164 mm2002 · driest 35 mm in 1986 | 22 |
| May | 33.9°C27 May 1991 | -2.2°C4 May 1986 | 52 mm28 May 2004 | 221 mm1996 · driest 43 mm in 2007 | 21 |
| June | 36.7°C26 Jun 1988 | 3.3°C5 Jun 1988 | 102 mm28 Jun 1998 | 371 mm1998 · driest 15 mm in 2007 | 21 |
| July | 40.6°C17 Jul 1988 | 4.4°C1 Jul 1988 | 72 mm23 Jul 2004 | 248 mm1992 · driest 42 mm in 1993 | 20 |
| August | 38.9°C18 Aug 1988 | 5.0°C30 Aug 1986 | 76 mm25 Aug 2000 | 156 mm1998 · driest 60 mm in 2002 | 20 |
| September | 35.6°C1 Sep 1993 | -0.6°C28 Sep 1989 | 67 mm14 Sep 1991 | 186 mm1996 · driest 22 mm in 2005 | 21 |
| October | 30.6°C1 Oct 1986 | -7.8°C27 Oct 1988 | 36 mm16 Oct 2002 | 157 mm2002 · driest 21 mm in 1997 | 20 |
| November | 28.3°C3 Nov 2004 | -11.7°C14 Nov 1986 | 79 mm26 Nov 1999 | 183 mm1986 · driest 32 mm in 2006 | 20 |
| December | 25.0°C6 Dec 2001 | -25.0°C22 Dec 1989 | 50 mm3 Dec 1991 | 195 mm1990 · driest 37 mm in 1989 | 22 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | <1 | 0 | 24 | 4 | 3 |
| February | <1 | 0 | 22 | 3 | 3 |
| March | 3 | <1 | 18 | 4 | 2 |
| April | 9 | 1 | 7 | 4 | <1 |
| May | 14 | 5 | <1 | 4 | 0 |
| June | 24 | 11 | 0 | 3 | 0 |
| July | 29 | 18 | 0 | 5 | 0 |
| August | 28 | 15 | 0 | 4 | 0 |
| September | 19 | 6 | 0 | 3 | 0 |
| October | 8 | <1 | 4 | 3 | 0 |
| November | 1 | 0 | 15 | 3 | <1 |
| December | <1 | 0 | 22 | 3 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 2% | 35% | 10% | 48% | 3.5–10.1°C |
| February | 4% | 36% | 11% | 49% | 6.4–11.0°C |
| March | 16% | 35% | 12% | 50% | 10.3–16.7°C |
| April | 36% | 38% | 12% | 51% | 18.2–22.2°C |
| May | 55% | 35% | 12% | 47% | 21.5–27.2°C |
| June | 68% | 30% | 12% | 36% | 27.1–29.7°C |
| July | 69% | 33% | 15% | 41% | 28.9–32.4°C |
| August | 75% | 27% | 13% | 31% | 27.8–31.7°C |
| September | 70% | 25% | 10% | 27% | 24.8–28.1°C |
| October | 43% | 25% | 8% | 28% | 17.7–21.8°C |
| November | 15% | 30% | 9% | 37% | 10.3–17.1°C |
| December | 3% | 34% | 10% | 45% | 3.9–10.9°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