September
September · June · August
76climate match
United States · 1991–2020
Best time to visit
West Concord.
September leads for comfortable weather in West Concord: typically 24.3°C by day, 10.3°C at night, with 109 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.3°C
Typical low10.3°C
Rain in September109 mm
July
July · August · June
70climate match
May
May · September · October
73climate match
The weakest month is January, scoring 5 against September’s 76 — days reach only 2.2°C, 22° below the 24°C the score treats as ideal, and nights drop to -9.2°C.
Month by month
The whole year,
without the guesswork.
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
Jan
52.2° / -9.2°
Feb
53.8° / -8.6°
Mar
58.5° / -3.9°
Apr
3415.8° / 2°
May
6621.7° / 8°
Jun
7426.3° / 13.2°
Jul
6729.6° / 16.2°
Aug
6928.6° / 15°
Sep
7624.3° / 10.3°
Oct
4117.6° / 3.6°
Nov
1511.3° / -1°
Dec
55.3° / -5.6°
| Month | Day | Night | Rain | Wet days | Sea | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|---|
| January | 2.2°C | -9.2°C | 90 mm | 9 | 4.9°C | 9 h 23 | 5 | Strong coverage |
| February | 3.8°C | -8.6°C | 92 mm | 7.6 | 3.3°C | 10 h 29 | 5 | Strong coverage |
| March | 8.5°C | -3.9°C | 118 mm | 9.5 | 3.5°C | 11 h 48 | 5 | Strong coverage |
| April | 15.8°C | 2°C | 103 mm | 9.3 | 5.8°C | 13 h 18 | 34 | Strong coverage |
| May | 21.7°C | 8°C | 93 mm | 9.7 | 10.1°C | 14 h 35 | 66 | Strong coverage |
| June | 26.3°C | 13.2°C | 101 mm | 9.1 | 14.7°C | 15 h 16 | 74 | Strong coverage |
| July | 29.6°C | 16.2°C | 92 mm | 7.8 | 18.2°C | 15 h | 67 | Strong coverage |
| August | 28.6°C | 15°C | 111 mm | 8.2 | 18.8°C | 13 h 54 | 69 | Strong coverage |
| September | 24.3°C | 10.3°C | 109 mm | 7.7 | 17.0°C | 12 h 26 | 76 | Good coverage |
| October | 17.6°C | 3.6°C | 122 mm | 8.6 | 13.5°C | 10 h 59 | 41 | Strong coverage |
| November | 11.3°C | -1°C | 100 mm | 8.5 | 10.2°C | 9 h 42 | 15 | Good coverage |
| December | 5.3°C | -5.6°C | 114 mm | 9 | 7.5°C | 9 h 05 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 22.2°C7 Jan 2007 | -30.0°C22 Jan 1984 | 69 mm25 Jan 1979 | 313 mm1979 · driest 15 mm in 2017 | 53 |
| February | 22.8°C25 Feb 1985 | -26.7°C5 Feb 1996 | 62 mm26 Feb 2010 | 247 mm2008 · driest 4 mm in 1987 | 52 |
| March | 31.1°C29 Mar 1998 | -22.2°C19 Mar 1967 | 68 mm30 Mar 2014 | 262 mm2001 · driest 15 mm in 2006 | 51 |
| April | 35.0°C20 Apr 1976 | -11.1°C2 Apr 1964 | 72 mm2 Apr 2004 | 311 mm1987 · driest 14 mm in 2014 | 51 |
| May | 37.2°C11 May 1979 | -3.9°C7 May 2001 | 69 mm10 May 1977 | 246 mm2006 · driest 4 mm in 2015 | 50 |
| June | 37.2°C11 Jun 2008 | 0.0°C6 Jun 1964 | 99 mm14 Jun 1998 | 336 mm1982 · driest 10 mm in 2016 | 51 |
| July | 40.6°C23 Jul 2011 | 4.4°C1 Jul 1988 | 94 mm14 Jul 1996 | 262 mm2008 · driest 3 mm in 2016 | 50 |
| August | 37.8°C13 Aug 2016 | 2.8°C22 Aug 1982 | 131 mm20 Aug 1991 | 234 mm1991 · driest 17 mm in 2007 | 51 |
| September | 36.7°C12 Sep 1983 | -3.3°C29 Sep 2000 | 132 mm7 Sep 2008 | 262 mm2008 · driest 18 mm in 2014 | 51 |
| October | 31.7°C7 Oct 1963 | -9.4°C21 Oct 1972 | 153 mm21 Oct 1996 | 374 mm2005 · driest 16 mm in 2013 | 52 |
| November | 26.7°C5 Nov 1987 | -15.6°C24 Nov 1989 | 78 mm7 Nov 1963 | 246 mm1963 · driest 0 mm in 2016 | 52 |
| December | 25.0°C8 Dec 1998 | -25.6°C26 Dec 1980 | 78 mm19 Dec 1986 | 223 mm2008 · driest 21 mm in 1980 | 51 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | 3 | 6 |
| February | 0 | 0 | 24 | 3 | 6 |
| March | <1 | 0 | 24 | 4 | 4 |
| April | 3 | <1 | 10 | 3 | 1 |
| May | 9 | 3 | <1 | 3 | 0 |
| June | 18 | 8 | 0 | 3 | 0 |
| July | 26 | 15 | 0 | 3 | 0 |
| August | 24 | 12 | 0 | 3 | 0 |
| September | 13 | 3 | <1 | 3 | 0 |
| October | 3 | <1 | 7 | 3 | <1 |
| November | <1 | 0 | 18 | 3 | 1 |
| December | 0 | 0 | 25 | 4 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 28% | 10% | 34% | -1.8–4.7°C |
| February | <1% | 26% | 10% | 28% | 0.5–6.8°C |
| March | 4% | 29% | 11% | 34% | 5.8–11.0°C |
| April | 18% | 30% | 11% | 38% | 12.9–17.3°C |
| May | 49% | 30% | 11% | 37% | 19.0–24.3°C |
| June | 65% | 30% | 10% | 33% | 23.9–28.0°C |
| July | 73% | 26% | 10% | 26% | 27.7–31.3°C |
| August | 74% | 25% | 10% | 23% | 26.2–29.9°C |
| September | 65% | 25% | 10% | 25% | 22.1–25.8°C |
| October | 28% | 25% | 10% | 24% | 15.3–19.6°C |
| November | 4% | 30% | 12% | 37% | 8.4–13.6°C |
| December | <1% | 29% | 12% | 33% | 1.7–7.6°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
Nearby, measured,
and named.
- Place identity
- GeoNames 4954923
- NOAA station
- USC00194580 · MAYNARD 2
- Station distance
- 5.1 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 24 usable years
- Daylight
- Calculated from latitude 42.46°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Sea temperature
- NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 44 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.