August
August · September · June
United States · 1991–2020
August leads for comfortable weather in Morristown: typically 26.4°C by day, 14.4°C at night, with 120 mm of rain. Based on measured 1991–2020 NOAA station history.
August · September · June
July · August · June
September · May · October
The weakest month is January, scoring 5 against August’s 74 — days reach only -5.1°C, 29° 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 | -5.1°C | -15.4°C | 24 mm | 5 | 9 h 12 | 5 | Good coverage |
| February | -1.9°C | -12.7°C | 25 mm | 4.3 | 10 h 23 | 5 | Good coverage |
| March | 4.4°C | -6.2°C | 48 mm | 5.7 | 11 h 47 | 5 | Good coverage |
| April | 13.5°C | 0.9°C | 80 mm | 8.7 | 13 h 23 | 29 | Good coverage |
| May | 20.2°C | 7.1°C | 114 mm | 10.2 | 14 h 45 | 56 | Good coverage |
| June | 25.5°C | 13.5°C | 141 mm | 10.7 | 15 h 29 | 71 | Good coverage |
| July | 27.3°C | 15.6°C | 120 mm | 8.8 | 15 h 12 | 71 | Good coverage |
| August | 26.4°C | 14.4°C | 120 mm | 8.4 | 14 h 01 | 74 | Good coverage |
| September | 22.3°C | 9.4°C | 91 mm | 7.1 | 12 h 27 | 73 | Good coverage |
| October | 15°C | 2.5°C | 66 mm | 6.9 | 10 h 55 | 40 | Good coverage |
| November | 5.4°C | -4.3°C | 42 mm | 4.7 | 9 h 33 | 5 | Good coverage |
| December | -1.8°C | -11.1°C | 31 mm | 5.3 | 8 h 53 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 17.2°C25 Jan 1944 | -40.0°C9 Jan 1977 | 33 mm11 Jan 1975 | 91 mm1969 · driest 0 mm in 1931 | 113 |
| February | 18.3°C17 Feb 1981 | -37.8°C2 Feb 1996 | 28 mm27 Feb 1948 | 60 mm1981 · driest 0 mm in 1987 | 113 |
| March | 27.2°C30 Mar 1986 | -34.4°C11 Mar 1948 | 51 mm25 Mar 1996 | 115 mm1979 · driest 6 mm in 1910 | 113 |
| April | 33.9°C21 Apr 1980 | -17.8°C6 Apr 1982 | 64 mm2 Apr 1967 | 153 mm2001 · driest 5 mm in 1921 | 113 |
| May | 42.2°C31 May 1934 | -8.9°C12 May 2006 | 73 mm1 May 1973 | 235 mm1991 · driest 4 mm in 1900 | 114 |
| June | 41.1°C27 Jun 1934 | 0.6°C4 Jun 1945 | 136 mm30 Jun 1901 | 305 mm1956 · driest 10 mm in 1910 | 115 |
| July | 43.3°C14 Jul 1936 | 2.2°C6 Jul 2001 | 136 mm21 Jul 1951 | 221 mm1997 · driest 5 mm in 1937 | 112 |
| August | 40.6°C15 Aug 1936 | 1.1°C30 Aug 1931 | 133 mm31 Aug 1962 | 283 mm1924 · driest 9 mm in 1925 | 110 |
| September | 38.9°C10 Sep 1931 | -5.0°C29 Sep 1908 | 111 mm11 Sep 1986 | 293 mm2010 · driest 7 mm in 1952 | 111 |
| October | 33.3°C4 Oct 1997 | -15.6°C30 Oct 1925 | 67 mm24 Oct 1899 | 165 mm2009 · driest 0 mm in 1952 | 112 |
| November | 26.1°C1 Nov 1933 | -26.1°C26 Nov 1977 | 59 mm10 Nov 1975 | 150 mm1991 · driest 0 mm in 1939 | 110 |
| December | 20.6°C20 Dec 1923 | -37.8°C19 Dec 1983 | 41 mm28 Dec 1982 | 87 mm1982 · driest 0 mm in 1943 | 111 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 5 |
| February | 0 | 0 | 27 | <1 | 4 |
| March | <1 | 0 | 26 | 1 | 3 |
| April | 2 | <1 | 13 | 3 | <1 |
| May | 7 | 2 | 3 | 4 | 0 |
| June | 18 | 5 | 0 | 4 | 0 |
| July | 24 | 8 | 0 | 4 | 0 |
| August | 22 | 5 | 0 | 4 | 0 |
| September | 11 | 2 | 2 | 2 | 0 |
| October | 3 | <1 | 12 | 2 | 0 |
| November | <1 | 0 | 24 | 2 | 2 |
| December | 0 | 0 | 30 | <1 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 14% | 1% | 8% | -9.0–-0.5°C |
| February | 0% | 13% | 2% | 8% | -6.3–1.6°C |
| March | 2% | 18% | 4% | 16% | 0.4–8.8°C |
| April | 17% | 25% | 7% | 28% | 10.1–17.9°C |
| May | 44% | 30% | 11% | 36% | 18.1–24.2°C |
| June | 63% | 31% | 13% | 37% | 23.4–28.2°C |
| July | 75% | 24% | 11% | 23% | 26.2–31.2°C |
| August | 74% | 25% | 11% | 25% | 24.7–29.8°C |
| September | 55% | 24% | 9% | 25% | 20.5–25.5°C |
| October | 26% | 19% | 6% | 16% | 13.4–19.4°C |
| November | 2% | 16% | 4% | 12% | 2.2–9.2°C |
| December | 0% | 15% | 2% | 9% | -6.1–1.6°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