September
September · May · June
United States · 1991–2020
September leads for comfortable weather in Lovettsville: typically 26.1°C by day, 12.3°C at night, with 115 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · June
August · July · June
October · April · May
The weakest month is January, scoring 5 against September’s 72 — days reach only 5.2°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 | 5.2°C | -5.6°C | 74 mm | 8.6 | 9 h 41 | 5 | Good coverage |
| February | 7.1°C | -5.2°C | 54 mm | 6.6 | 10 h 39 | 5 | Good coverage |
| March | 12°C | -1.6°C | 84 mm | 8.8 | 11 h 50 | 18 | Good coverage |
| April | 18.5°C | 3.8°C | 94 mm | 10.2 | 13 h 11 | 47 | Good coverage |
| May | 23.5°C | 9.6°C | 111 mm | 10.8 | 14 h 18 | 71 | Good coverage |
| June | 27.9°C | 14.6°C | 116 mm | 9.7 | 14 h 55 | 69 | Good coverage |
| July | 30.4°C | 16.8°C | 112 mm | 9 | 14 h 41 | 60 | Good coverage |
| August | 29.6°C | 16.2°C | 75 mm | 7.7 | 13 h 42 | 69 | Good coverage |
| September | 26.1°C | 12.3°C | 115 mm | 8.1 | 12 h 24 | 72 | Good coverage |
| October | 19.6°C | 6°C | 95 mm | 7.5 | 11 h 06 | 57 | Good coverage |
| November | 13.6°C | 0.2°C | 70 mm | 5.9 | 9 h 58 | 32 | Good coverage |
| December | 7.4°C | -3.7°C | 87 mm | 8 | 9 h 25 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 22.8°C30 Jan 2002 | -19.4°C25 Jan 2004 | 55 mm31 Jan 2013 | 137 mm1999 · driest 34 mm in 2008 | 20 |
| February | 26.7°C26 Feb 2000 | -21.1°C20 Feb 2015 | 62 mm17 Feb 2003 | 172 mm2003 · driest 6 mm in 2002 | 19 |
| March | 29.4°C9 Mar 2000 | -20.0°C6 Mar 2015 | 74 mm22 Mar 2019 | 147 mm2011 · driest 7 mm in 2006 | 24 |
| April | 34.4°C18 Apr 2002 | -7.2°C4 Apr 2013 | 89 mm17 Apr 2011 | 212 mm2011 · driest 41 mm in 2016 | 24 |
| May | 35.0°C31 May 2006 | -1.7°C14 May 2013 | 101 mm16 May 2014 | 216 mm2019 · driest 32 mm in 1999 | 23 |
| June | 37.2°C30 Jun 2012 | 2.2°C1 Jun 2001 | 81 mm26 Jun 2006 | 197 mm2015 · driest 9 mm in 2011 | 24 |
| July | 38.3°C30 Jul 2011 | 7.8°C8 Jul 2000 | 108 mm22 Jul 2018 | 202 mm2018 · driest 32 mm in 2010 | 24 |
| August | 37.2°C1 Aug 1999 | 7.8°C31 Aug 1999 | 80 mm27 Aug 2012 | 144 mm2018 · driest 6 mm in 2010 | 23 |
| September | 36.7°C3 Sep 2010 | 0.6°C20 Sep 2020 | 96 mm18 Sep 2004 | 266 mm2018 · driest 0 mm in 2013 | 24 |
| October | 33.9°C3 Oct 2019 | -4.4°C30 Oct 2011 | 116 mm30 Oct 2012 | 213 mm2005 · driest 8 mm in 2000 | 24 |
| November | 28.9°C4 Nov 2003 | -11.1°C19 Nov 2014 | 49 mm12 Nov 2020 | 192 mm2018 · driest 13 mm in 1998 | 24 |
| December | 26.7°C6 Dec 2001 | -17.8°C24 Dec 2000 | 61 mm16 Dec 2018 | 176 mm2009 · driest 20 mm in 1998 | 22 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 25 | 2 | 4 |
| February | <1 | 0 | 24 | 2 | 3 |
| March | 1 | 0 | 20 | 3 | 2 |
| April | 5 | 1 | 8 | 3 | <1 |
| May | 14 | 4 | <1 | 4 | 0 |
| June | 24 | 10 | 0 | 3 | 0 |
| July | 29 | 17 | 0 | 3 | 0 |
| August | 27 | 15 | 0 | 2 | 0 |
| September | 18 | 6 | 0 | 3 | 0 |
| October | 5 | <1 | 4 | 3 | <1 |
| November | <1 | 0 | 17 | 3 | 0 |
| December | <1 | 0 | 24 | 3 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 1% | 27% | 7% | 28% | 2.1–7.7°C |
| February | 2% | 24% | 7% | 26% | 3.1–9.6°C |
| March | 12% | 29% | 8% | 35% | 9.0–15.0°C |
| April | 29% | 33% | 10% | 44% | 16.2–20.3°C |
| May | 53% | 35% | 12% | 46% | 20.9–26.1°C |
| June | 67% | 32% | 12% | 35% | 26.8–29.2°C |
| July | 72% | 28% | 12% | 28% | 28.5–32.5°C |
| August | 74% | 26% | 8% | 29% | 27.4–31.1°C |
| September | 69% | 27% | 11% | 29% | 24.4–28.6°C |
| October | 43% | 24% | 9% | 24% | 17.9–21.8°C |
| November | 13% | 20% | 9% | 18% | 10.6–16.6°C |
| December | 3% | 25% | 9% | 28% | 4.5–11.7°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