April
April · October · May
United States · 1991–2020
April leads for comfortable weather in Arlington: typically 24.1°C by day, 12.2°C at night, with 90 mm of rain. Based on measured 1991–2020 NOAA station history.
April · October · May
September · June · August
November · March · April
The weakest month is January, scoring 36 against April’s 84 — days reach only 13.8°C, 10° below the 24°C the score treats as ideal, and nights drop to 1.7°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 | 13.8°C | 1.7°C | 68 mm | 4.8 | 10 h 13 | 36 | Strong coverage |
| February | 16.1°C | 3.8°C | 83 mm | 5.7 | 10 h 58 | 45 | Strong coverage |
| March | 20.2°C | 8.2°C | 93 mm | 6.4 | 11 h 53 | 64 | Strong coverage |
| April | 24.1°C | 12.2°C | 90 mm | 5.7 | 12 h 57 | 84 | Strong coverage |
| May | 28.1°C | 17.4°C | 119 mm | 7.4 | 13 h 49 | 66 | Strong coverage |
| June | 32.5°C | 21.7°C | 107 mm | 7 | 14 h 18 | 46 | Strong coverage |
| July | 35.1°C | 23.7°C | 57 mm | 4.3 | 14 h 06 | 44 | Strong coverage |
| August | 34.9°C | 23.3°C | 64 mm | 4.2 | 13 h 21 | 44 | Strong coverage |
| September | 31.1°C | 19.2°C | 83 mm | 5.3 | 12 h 20 | 60 | Strong coverage |
| October | 25.6°C | 13°C | 121 mm | 5.8 | 11 h 19 | 77 | Strong coverage |
| November | 19°C | 7.1°C | 69 mm | 5.1 | 10 h 26 | 63 | Strong coverage |
| December | 14.3°C | 2.6°C | 78 mm | 4.7 | 10 h 00 | 38 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 28.3°C13 Jan 2000 | -16.1°C24 Jan 1894 | 91 mm16 Jan 2017 | 164 mm1998 · driest 0 mm in 1997 | 28 |
| February | 35.6°C22 Feb 1996 | -12.8°C5 Feb 1996 | 119 mm7 Feb 2018 | 335 mm2018 · driest 4 mm in 1999 | 29 |
| March | 34.4°C23 Mar 1995 | -9.4°C3 Mar 2014 | 98 mm20 Mar 2002 | 217 mm2020 · driest 21 mm in 2014 | 29 |
| April | 38.3°C18 Apr 2006 | -0.6°C13 Apr 1997 | 85 mm24 Apr 2019 | 182 mm1997 · driest 15 mm in 2005 | 28 |
| May | 38.3°C6 May 1998 | 3.9°C3 May 2013 | 112 mm14 May 1893 | 446 mm2015 · driest 11 mm in 1996 | 29 |
| June | 40.6°C27 Jun 2012 | 10.6°C12 Jun 1995 | 78 mm11 Jun 2009 | 330 mm2004 · driest 15 mm in 2005 | 29 |
| July | 43.3°C13 Jul 1998 | 13.9°C28 Jul 1994 | 81 mm1 Jul 2001 | 149 mm1996 · driest 0 mm in 2000 | 30 |
| August | 43.3°C4 Aug 1998 | 11.1°C29 Aug 1992 | 113 mm14 Aug 1991 | 239 mm1991 · driest 0 mm in 2000 | 29 |
| September | 43.9°C5 Sep 2000 | 4.4°C23 Sep 1995 | 185 mm22 Sep 2018 | 383 mm2018 · driest 0 mm in 2000 | 28 |
| October | 36.1°C1 Oct 1998 | -7.2°C31 Oct 1993 | 170 mm24 Oct 2015 | 322 mm2015 · driest 5 mm in 1995 | 29 |
| November | 31.7°C6 Nov 2017 | -6.7°C26 Nov 1993 | 108 mm27 Nov 2015 | 281 mm2015 · driest 1 mm in 2012 | 27 |
| December | 31.1°C4 Dec 2005 | -12.2°C10 Dec 1995 | 136 mm21 Dec 1991 | 291 mm1991 · driest 8 mm in 1893 | 27 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 1 | 0 | 11 | 2 |
| February | 3 | <1 | 7 | 2 |
| March | 8 | <1 | 2 | 3 |
| April | 15 | 2 | <1 | 3 |
| May | 26 | 10 | 0 | 4 |
| June | 29 | 24 | 0 | 3 |
| July | 30 | 29 | 0 | 2 |
| August | 30 | 29 | 0 | 2 |
| September | 27 | 20 | 0 | 2 |
| October | 19 | 6 | <1 | 3 |
| November | 6 | <1 | 3 | 2 |
| December | 1 | 0 | 10 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 20% | 17% | 6% | 15% | 11.6–16.2°C |
| February | 29% | 21% | 8% | 17% | 12.9–19.4°C |
| March | 49% | 20% | 8% | 14% | 18.0–23.0°C |
| April | 70% | 21% | 11% | 19% | 22.2–26.5°C |
| May | 73% | 24% | 13% | 23% | 26.7–30.3°C |
| June | 75% | 21% | 10% | 18% | 30.7–34.6°C |
| July | 85% | 14% | 6% | 9% | 33.2–36.4°C |
| August | 86% | 14% | 6% | 10% | 32.4–37.4°C |
| September | 82% | 18% | 8% | 15% | 28.7–33.5°C |
| October | 72% | 18% | 9% | 15% | 23.5–27.8°C |
| November | 43% | 17% | 7% | 12% | 16.1–22.0°C |
| December | 20% | 15% | 7% | 13% | 12.1–16.9°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