September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Tramway: typically 27.1°C by day, 7.4°C at night, with 27 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
July · August · September
May · September · October
The weakest month is January, scoring 5 against September’s 75 — days reach only 3.8°C, 20° 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 | 3.8°C | -2.7°C | 57 mm | 9.4 | 8 h 59 | 5 | Good coverage |
| February | 8.1°C | -2°C | 45 mm | 7.8 | 10 h 15 | 11 | Good coverage |
| March | 13.5°C | 0.1°C | 70 mm | 11 | 11 h 45 | 27 | Good coverage |
| April | 17.9°C | 2.6°C | 67 mm | 10.1 | 13 h 29 | 47 | Good coverage |
| May | 23.2°C | 6.3°C | 64 mm | 8.4 | 14 h 57 | 73 | Good coverage |
| June | 27°C | 9.8°C | 61 mm | 7.7 | 15 h 46 | 73 | Good coverage |
| July | 33.7°C | 12°C | 21 mm | 3.2 | 15 h 27 | 62 | Good coverage |
| August | 33.5°C | 11.1°C | 19 mm | 2.9 | 14 h 10 | 62 | Good coverage |
| September | 27.1°C | 7.4°C | 27 mm | 4.3 | 12 h 29 | 75 | Good coverage |
| October | 17.1°C | 2.9°C | 49 mm | 7.8 | 10 h 49 | 49 | Good coverage |
| November | 8.1°C | -0.4°C | 63 mm | 9.7 | 9 h 21 | 10 | Good coverage |
| December | 3°C | -3.3°C | 47 mm | 9 | 8 h 37 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 15.0°C29 Jan 1999 | -20.6°C5 Jan 2004 | 26 mm27 Jan 2003 | 121 mm2003 · driest 6 mm in 2021 | 24 |
| February | 18.9°C28 Feb 2006 | -18.3°C6 Feb 2014 | 48 mm7 Feb 2020 | 103 mm2020 · driest 1 mm in 2005 | 25 |
| March | 27.2°C30 Mar 2004 | -13.3°C4 Mar 2019 | 35 mm4 Mar 2026 | 167 mm2026 · driest 11 mm in 2006 | 24 |
| April | 31.7°C28 Apr 2018 | -7.2°C20 Apr 2006 | 35 mm22 Apr 2026 | 161 mm2026 · driest 16 mm in 2005 | 24 |
| May | 36.7°C17 May 2006 | -2.8°C2 May 2008 | 42 mm11 May 2004 | 113 mm2005 · driest 13 mm in 2023 | 22 |
| June | 43.3°C29 Jun 2021 | -2.2°C18 Jun 2005 | 36 mm14 Jun 2009 | 157 mm2010 · driest 13 mm in 2003 | 25 |
| July | 42.8°C1 Jul 2021 | -0.6°C10 Jul 2021 | 43 mm12 Jul 2021 | 43 mm2021 · driest 0 mm in 2018 | 26 |
| August | 43.3°C10 Aug 2018 | 1.7°C23 Aug 2005 | 29 mm21 Aug 2008 | 73 mm2004 · driest 0 mm in 2012 | 26 |
| September | 41.7°C2 Sep 2025 | -3.3°C23 Sep 2000 | 31 mm9 Sep 1998 | 84 mm2013 · driest 0 mm in 2012 | 26 |
| October | 31.7°C6 Oct 2003 | -11.7°C30 Oct 2019 | 37 mm3 Oct 2000 | 107 mm2025 · driest 3 mm in 2013 | 26 |
| November | 22.2°C11 Nov 1999 | -15.6°C24 Nov 2010 | 37 mm19 Nov 2007 | 138 mm2006 · driest 17 mm in 2004 | 24 |
| December | 16.1°C8 Dec 2015 | -19.4°C8 Dec 2013 | 31 mm2 Dec 2013 | 199 mm2025 · driest 15 mm in 2011 | 23 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 21 | 1 | 2 |
| February | 0 | 0 | 19 | <1 | 1 |
| March | <1 | 0 | 14 | 2 | <1 |
| April | 3 | <1 | 8 | 2 | 0 |
| May | 12 | 3 | 2 | 2 | 0 |
| June | 20 | 9 | <1 | 2 | 0 |
| July | 28 | 24 | 0 | <1 | 0 |
| August | 27 | 23 | 0 | <1 | 0 |
| September | 18 | 9 | <1 | <1 | 0 |
| October | 2 | <1 | 8 | 1 | 0 |
| November | 0 | 0 | 14 | 2 | <1 |
| December | 0 | 0 | 23 | <1 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 32% | 5% | 39% | 2.3–5.9°C |
| February | 0% | 30% | 4% | 36% | 5.1–10.1°C |
| March | 7% | 34% | 5% | 41% | 10.9–16.1°C |
| April | 32% | 33% | 7% | 42% | 16.3–19.9°C |
| May | 63% | 30% | 6% | 37% | 21.7–24.8°C |
| June | 73% | 28% | 7% | 33% | 24.5–30.8°C |
| July | 94% | 10% | 2% | 6% | 31.0–35.6°C |
| August | 90% | 11% | 2% | 9% | 32.1–34.9°C |
| September | 82% | 17% | 4% | 16% | 25.1–30.5°C |
| October | 25% | 25% | 5% | 28% | 14.9–19.8°C |
| November | <1% | 35% | 6% | 45% | 6.6–9.6°C |
| December | 0% | 31% | 5% | 35% | 0.2–5.0°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