September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Orchard Grass Hills: typically 27°C by day, 13.1°C at night, with 92 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · April · September
The weakest month is January, scoring 5 against September’s 75 — days reach only 4.8°C, 19° below the 24°C the score treats as ideal.
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 | 4.8°C | -4.8°C | 100 mm | 9 | 9 h 46 | 5 | Good coverage |
| February | 7.3°C | -3.2°C | 85 mm | 7.9 | 10 h 42 | 5 | Good coverage |
| March | 13.4°C | 1°C | 120 mm | 11 | 11 h 50 | 21 | Good coverage |
| April | 19.9°C | 5.9°C | 128 mm | 11.3 | 13 h 08 | 50 | Good coverage |
| May | 24.9°C | 11.5°C | 156 mm | 11.5 | 14 h 14 | 66 | Good coverage |
| June | 29.2°C | 16.4°C | 126 mm | 10.3 | 14 h 49 | 61 | Good coverage |
| July | 30.7°C | 18.2°C | 123 mm | 8.9 | 14 h 35 | 55 | Good coverage |
| August | 30.7°C | 17.5°C | 95 mm | 7 | 13 h 39 | 61 | Good coverage |
| September | 27°C | 13.1°C | 92 mm | 6.8 | 12 h 23 | 75 | Good coverage |
| October | 20°C | 6.7°C | 91 mm | 7.2 | 11 h 08 | 60 | Good coverage |
| November | 12.9°C | 1.4°C | 105 mm | 8.8 | 10 h 02 | 24 | Good coverage |
| December | 6.1°C | -3.3°C | 114 mm | 10.2 | 9 h 30 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.0°C2 Jan 2006 | -22.8°C31 Jan 2004 | 71 mm3 Jan 2000 | 193 mm1999 · driest 24 mm in 2003 | 17 |
| February | 25.0°C26 Feb 2000 | -23.3°C4 Feb 1996 | 108 mm18 Feb 2000 | 198 mm2000 · driest 36 mm in 2002 | 17 |
| March | 30.0°C29 Mar 1998 | -13.3°C3 Mar 2002 | 109 mm1 Mar 1997 | 289 mm2008 · driest 50 mm in 2010 | 17 |
| April | 32.2°C30 Apr 2007 | -5.6°C9 Apr 1997 | 105 mm11 Apr 2011 | 464 mm2011 · driest 33 mm in 2001 | 16 |
| May | 35.0°C31 May 2011 | 0.0°C16 May 1997 | 94 mm19 May 2005 | 334 mm2004 · driest 46 mm in 2007 | 16 |
| June | 36.1°C23 Jun 2010 | 6.7°C7 Jun 1998 | 86 mm1 Jun 2006 | 222 mm2002 · driest 31 mm in 2004 | 16 |
| July | 40.6°C30 Jul 1999 | 10.0°C18 Jul 2009 | 78 mm16 Jul 2004 | 277 mm2004 · driest 35 mm in 1999 | 16 |
| August | 38.9°C16 Aug 2007 | 9.4°C7 Aug 1997 | 101 mm27 Aug 2006 | 175 mm2003 · driest 9 mm in 2002 | 16 |
| September | 37.8°C4 Sep 1999 | 2.8°C26 Sep 2001 | 121 mm22 Sep 2006 | 267 mm2006 · driest 5 mm in 2004 | 16 |
| October | 33.3°C7 Oct 2007 | -3.9°C23 Oct 1997 | 109 mm22 Oct 2007 | 218 mm2007 · driest 21 mm in 2000 | 17 |
| November | 26.7°C2 Nov 2000 | -11.7°C25 Nov 2005 | 66 mm14 Nov 2005 | 207 mm2011 · driest 28 mm in 2009 | 16 |
| December | 23.3°C6 Dec 1998 | -19.4°C24 Dec 2004 | 58 mm22 Dec 2004 | 204 mm2007 · driest 64 mm in 2005 | 17 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 24 | 3 | 7 |
| February | <1 | 0 | 21 | 3 | 5 |
| March | 2 | <1 | 15 | 4 | 1 |
| April | 8 | <1 | 4 | 5 | <1 |
| May | 17 | 6 | <1 | 5 | 0 |
| June | 27 | 15 | 0 | 5 | 0 |
| July | 30 | 19 | 0 | 4 | 0 |
| August | 29 | 19 | 0 | 3 | 0 |
| September | 21 | 8 | 0 | 3 | 0 |
| October | 7 | <1 | 3 | 3 | 0 |
| November | <1 | 0 | 12 | 4 | <1 |
| December | 0 | 0 | 22 | 4 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 28% | 11% | 35% | 2.0–8.2°C |
| February | 2% | 28% | 10% | 34% | 2.8–9.9°C |
| March | 12% | 35% | 13% | 47% | 10.6–16.5°C |
| April | 34% | 37% | 15% | 51% | 17.7–22.2°C |
| May | 53% | 37% | 17% | 51% | 23.0–27.0°C |
| June | 63% | 33% | 14% | 39% | 27.7–30.5°C |
| July | 72% | 29% | 12% | 32% | 29.3–32.5°C |
| August | 78% | 23% | 9% | 20% | 28.7–32.2°C |
| September | 72% | 22% | 9% | 24% | 24.1–30.1°C |
| October | 39% | 23% | 8% | 25% | 17.4–21.5°C |
| November | 10% | 29% | 12% | 33% | 9.3–15.4°C |
| December | <1% | 35% | 13% | 46% | 2.6–8.9°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