October
October · April · May
United States · 1991–2020
October leads for comfortable weather in Frederick: typically 24.5°C by day, 10.1°C at night, with 81 mm of rain. Based on measured 1991–2020 NOAA station history.
October · April · May
September · July · August
March · November · October
The weakest month is January, scoring 28 against October’s 82 — days reach only 11.5°C, 12° below the 24°C the score treats as ideal, and nights drop to -2.3°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 | 11.5°C | -2.3°C | 29 mm | 3.1 | 10 h 05 | 28 | Good coverage |
| February | 14.1°C | -0.2°C | 42 mm | 3.7 | 10 h 54 | 38 | Good coverage |
| March | 18.7°C | 4.3°C | 58 mm | 4.7 | 11 h 52 | 58 | Good coverage |
| April | 23.8°C | 8.6°C | 85 mm | 5.5 | 13 h | 78 | Good coverage |
| May | 28°C | 14.4°C | 94 mm | 6.1 | 13 h 56 | 75 | Good coverage |
| June | 32.5°C | 19.3°C | 122 mm | 6 | 14 h 26 | 49 | Good coverage |
| July | 35.6°C | 21.7°C | 49 mm | 3.6 | 14 h 15 | 47 | Good coverage |
| August | 34.9°C | 21.1°C | 67 mm | 4.7 | 13 h 26 | 47 | Good coverage |
| September | 30.3°C | 16.5°C | 67 mm | 4.4 | 12 h 21 | 71 | Good coverage |
| October | 24.5°C | 10.1°C | 81 mm | 4.7 | 11 h 16 | 82 | Good coverage |
| November | 17.3°C | 3.4°C | 33 mm | 2.8 | 10 h 19 | 57 | Good coverage |
| December | 11.7°C | -1.6°C | 34 mm | 2.3 | 9 h 52 | 30 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 32.2°C31 Jan 1911 | -22.2°C3 Jan 1911 | 52 mm8 Jan 1939 | 126 mm1949 · driest 0 mm in 1967 | 101 |
| February | 33.9°C25 Feb 1917 | -20.6°C8 Feb 1933 | 65 mm18 Feb 1911 | 105 mm1911 · driest 0 mm in 1916 | 102 |
| March | 40.0°C27 Mar 1971 | -16.1°C11 Mar 1948 | 72 mm30 Mar 1953 | 149 mm1953 · driest 0 mm in 1925 | 101 |
| April | 39.4°C12 Apr 1972 | -5.0°C2 Apr 1936 | 105 mm8 Apr 2008 | 246 mm1922 · driest 1 mm in 1987 | 100 |
| May | 43.9°C23 May 2000 | 1.7°C16 May 1983 | 126 mm8 May 1922 | 297 mm1982 · driest 3 mm in 2004 | 104 |
| June | 46.1°C28 Jun 1994 | 4.4°C1 Jun 1983 | 162 mm22 Jun 1975 | 341 mm2007 · driest 0 mm in 1911 | 105 |
| July | 45.6°C19 Jul 1936 | 11.1°C5 Jul 1924 | 88 mm20 Jul 1915 | 154 mm1958 · driest 0 mm in 1943 | 104 |
| August | 47.2°C3 Aug 1943 | 8.9°C31 Aug 1915 | 91 mm28 Aug 1977 | 201 mm1966 · driest 0 mm in 1943 | 105 |
| September | 43.9°C1 Sep 1947 | 1.1°C26 Sep 1912 | 150 mm22 Sep 1969 | 248 mm1936 · driest 0 mm in 1939 | 104 |
| October | 40.0°C1 Oct 1977 | -8.3°C30 Oct 1917 | 111 mm22 Oct 2000 | 385 mm2000 · driest 0 mm in 1992 | 102 |
| November | 33.9°C5 Nov 1914 | -12.8°C29 Nov 1911 | 58 mm27 Nov 1919 | 178 mm2004 · driest 0 mm in 1904 | 98 |
| December | 30.0°C24 Dec 1955 | -18.9°C21 Dec 1989 | 78 mm23 Dec 1932 | 163 mm1911 · driest 0 mm in 2003 | 101 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | <1 | 0 | 20 | 1 |
| February | 2 | <1 | 14 | 2 |
| March | 6 | 2 | 5 | 2 |
| April | 13 | 4 | <1 | 3 |
| May | 20 | 11 | 0 | 3 |
| June | 27 | 21 | 0 | 4 |
| July | 29 | 27 | 0 | 2 |
| August | 27 | 24 | 0 | 2 |
| September | 23 | 15 | 0 | 2 |
| October | 15 | 5 | <1 | 2 |
| November | 4 | <1 | 6 | 1 |
| December | <1 | 0 | 17 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 14% | 10% | 3% | 6% | 7.5–16.3°C |
| February | 27% | 13% | 4% | 10% | 10.4–18.9°C |
| March | 50% | 14% | 6% | 10% | 16.0–23.5°C |
| April | 70% | 17% | 7% | 14% | 22.1–27.9°C |
| May | 75% | 23% | 11% | 25% | 26.0–31.4°C |
| June | 81% | 18% | 9% | 14% | 30.9–35.9°C |
| July | 86% | 13% | 6% | 8% | 33.9–39.1°C |
| August | 84% | 15% | 6% | 13% | 33.4–38.9°C |
| September | 83% | 16% | 7% | 13% | 29.0–34.7°C |
| October | 75% | 15% | 7% | 13% | 22.7–28.4°C |
| November | 42% | 11% | 4% | 7% | 15.1–21.0°C |
| December | 13% | 10% | 3% | 6% | 9.2–15.8°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