October
October · April · March
United States · 1991–2020
October leads for comfortable weather in Calvert: typically 26.2°C by day, 14.4°C at night, with 105 mm of rain. Based on measured 1991–2020 NOAA station history.
October · April · March
May · September · October
November · March · February
The weakest month is July, scoring 26 against October’s 80 — days average 32.2°C, 8° above the 24°C the score treats as ideal, and 207 mm of rain falls.
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 | 16.1°C | 4.8°C | 154 mm | 9.3 | 10 h 20 | 33 | Strong coverage |
| February | 18.3°C | 6.7°C | 127 mm | 7.5 | 11 h 02 | 49 | Strong coverage |
| March | 22°C | 9.9°C | 130 mm | 7.2 | 11 h 54 | 67 | Strong coverage |
| April | 25.2°C | 13.3°C | 140 mm | 6.5 | 12 h 53 | 75 | Strong coverage |
| May | 29°C | 17.7°C | 149 mm | 7 | 13 h 43 | 59 | Strong coverage |
| June | 31.3°C | 21.4°C | 187 mm | 10.5 | 14 h 09 | 36 | Strong coverage |
| July | 32.2°C | 22.6°C | 207 mm | 13.3 | 13 h 59 | 26 | Strong coverage |
| August | 32.1°C | 22.4°C | 180 mm | 11.9 | 13 h 17 | 32 | Strong coverage |
| September | 30.5°C | 20.3°C | 164 mm | 8.4 | 12 h 19 | 46 | Strong coverage |
| October | 26.2°C | 14.4°C | 105 mm | 5.4 | 11 h 21 | 80 | Strong coverage |
| November | 21°C | 9.1°C | 120 mm | 6.4 | 10 h 32 | 64 | Strong coverage |
| December | 17.1°C | 6°C | 142 mm | 8.3 | 10 h 08 | 41 | Strong coverage |
What has changed
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 29.4°C11 Jan 1949 | -16.7°C21 Jan 1985 | 193 mm2 Jan 1936 | 441 mm1936 · driest 0 mm in 1921 | 104 |
| February | 28.9°C15 Feb 1927 | -12.2°C3 Feb 1951 | 193 mm13 Feb 1927 | 315 mm1927 · driest 22 mm in 2024 | 104 |
| March | 31.7°C30 Mar 1946 | -8.9°C3 Mar 1980 | 231 mm31 Mar 1962 | 578 mm1929 · driest 11 mm in 1918 | 105 |
| April | 34.4°C30 Apr 1943 | -2.2°C4 Apr 1987 | 311 mm7 Apr 1983 | 485 mm1983 · driest 0 mm in 1915 | 106 |
| May | 37.8°C31 May 1951 | 2.8°C3 May 1921 | 195 mm18 May 2003 | 458 mm2003 · driest 2 mm in 1988 | 105 |
| June | 40.6°C14 Jun 1963 | 10.6°C1 Jun 1984 | 242 mm7 Jun 2003 | 543 mm2003 · driest 9 mm in 1936 | 103 |
| July | 39.4°C24 Jul 1952 | 12.2°C1 Jul 1930 | 396 mm20 Jul 1997 | 702 mm1916 · driest 44 mm in 1976 | 103 |
| August | 40.0°C12 Aug 2007 | 13.3°C14 Aug 2004 | 137 mm18 Aug 1969 | 365 mm1969 · driest 21 mm in 2024 | 103 |
| September | 41.1°C6 Sep 1925 | 5.0°C29 Sep 1967 | 384 mm28 Sep 1998 | 655 mm1998 · driest 2 mm in 1984 | 102 |
| October | 36.1°C4 Oct 2019 | -0.6°C29 Oct 2008 | 231 mm17 Oct 1923 | 290 mm1923 · driest 0 mm in 1978 | 102 |
| November | 31.1°C10 Nov 1935 | -7.2°C25 Nov 1950 | 155 mm7 Nov 1943 | 341 mm1992 · driest 3 mm in 2025 | 103 |
| December | 28.9°C6 Dec 1926 | -13.9°C25 Dec 1983 | 163 mm11 Dec 1983 | 422 mm2009 · driest 11 mm in 1959 | 102 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 1 | 0 | 7 | 5 |
| February | 2 | 0 | 4 | 4 |
| March | 9 | <1 | 1 | 4 |
| April | 18 | 2 | 0 | 4 |
| May | 28 | 13 | 0 | 4 |
| June | 29 | 23 | 0 | 5 |
| July | 30 | 27 | 0 | 6 |
| August | 30 | 27 | 0 | 5 |
| September | 29 | 20 | 0 | 4 |
| October | 21 | 5 | <1 | 3 |
| November | 6 | <1 | 2 | 3 |
| December | 2 | 0 | 6 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 24% | 27% | 13% | 27% | 13.6–20.0°C |
| February | 35% | 26% | 13% | 25% | 15.7–21.6°C |
| March | 56% | 24% | 14% | 21% | 19.7–24.4°C |
| April | 75% | 21% | 12% | 15% | 23.9–27.5°C |
| May | 77% | 23% | 12% | 25% | 27.6–30.6°C |
| June | 67% | 33% | 16% | 40% | 30.5–33.6°C |
| July | 57% | 43% | 21% | 58% | 31.2–33.7°C |
| August | 64% | 36% | 17% | 45% | 31.1–34.0°C |
| September | 74% | 26% | 12% | 26% | 29.4–32.4°C |
| October | 80% | 15% | 8% | 13% | 25.1–28.2°C |
| November | 52% | 20% | 10% | 16% | 19.3–23.5°C |
| December | 26% | 25% | 13% | 24% | 15.2–20.8°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