September
September · June · July
81climate match
United States · 1991–2020
Best time to visit
Newtown.
September leads for comfortable weather in Newtown: typically 23.9°C by day, 5°C at night, with 22 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high23.9°C
Typical low5°C
Rain in September22 mm
July
July · August · June
68climate match
May
May · September · June
78climate match
The weakest month is January, scoring 5 against September’s 81 — days reach only -2.3°C, 26° below the 24°C the score treats as ideal, and nights drop to -16°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
5-2.3° / -16°
Feb
51.5° / -12.6°
Mar
67.8° / -7.3°
Apr
4416.1° / -1.1°
May
6621.4° / 4.3°
Jun
7425.1° / 9.2°
Jul
7130.3° / 11.8°
Aug
7130.3° / 10.7°
Sep
8123.9° / 5°
Oct
4416.1° / -1.2°
Nov
56.3° / -7.8°
Dec
50.1° / -13.6°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -2.3°C | -16°C | 13 mm | 3.1 | 8 h 43 | 5 | Good coverage |
| February | 1.5°C | -12.6°C | 7 mm | 2.3 | 10 h 06 | 5 | Good coverage |
| March | 7.8°C | -7.3°C | 15 mm | 2.9 | 11 h 44 | 6 | Good coverage |
| April | 16.1°C | -1.1°C | 22 mm | 4.6 | 13 h 36 | 44 | Good coverage |
| May | 21.4°C | 4.3°C | 49 mm | 7.5 | 15 h 12 | 66 | Good coverage |
| June | 25.1°C | 9.2°C | 77 mm | 9.4 | 16 h 05 | 74 | Good coverage |
| July | 30.3°C | 11.8°C | 37 mm | 5.3 | 15 h 44 | 71 | Good coverage |
| August | 30.3°C | 10.7°C | 22 mm | 3.9 | 14 h 20 | 71 | Good coverage |
| September | 23.9°C | 5°C | 22 mm | 3.9 | 12 h 31 | 81 | Good coverage |
| October | 16.1°C | -1.2°C | 16 mm | 3.6 | 10 h 43 | 44 | Good coverage |
| November | 6.3°C | -7.8°C | 14 mm | 3.5 | 9 h 07 | 5 | Good coverage |
| December | 0.1°C | -13.6°C | 11 mm | 2.3 | 8 h 19 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.9°C7 Jan 2003 | -45.6°C24 Jan 1969 | 25 mm3 Jan 2011 | 48 mm1969 · driest 0 mm in 1984 | 80 |
| February | 23.3°C27 Feb 1992 | -45.6°C15 Feb 1936 | 28 mm20 Feb 1897 | 58 mm1897 · driest 0 mm in 1983 | 80 |
| March | 27.8°C30 Mar 2004 | -38.3°C6 Mar 1996 | 39 mm4 Mar 2006 | 56 mm2011 · driest 0 mm in 1973 | 80 |
| April | 35.0°C29 Apr 1939 | -24.4°C3 Apr 1936 | 34 mm9 Apr 2005 | 68 mm1932 · driest 0 mm in 1949 | 81 |
| May | 36.7°C22 May 1980 | -12.2°C2 May 1954 | 47 mm29 May 1982 | 143 mm1986 · driest 0 mm in 1980 | 79 |
| June | 41.7°C4 Jun 1988 | -3.3°C1 Jun 1951 | 81 mm6 Jun 1995 | 189 mm1942 · driest 2 mm in 1985 | 78 |
| July | 41.7°C27 Jul 1933 | 1.7°C9 Jul 1944 | 96 mm3 Jul 1978 | 151 mm1978 · driest 1 mm in 1994 | 80 |
| August | 41.7°C6 Aug 1998 | -1.1°C19 Aug 1950 | 62 mm20 Aug 1966 | 107 mm1933 · driest 0 mm in 1949 | 80 |
| September | 38.9°C1 Sep 1983 | -10.6°C21 Sep 1995 | 146 mm25 Sep 1986 | 222 mm1986 · driest 1 mm in 1990 | 80 |
| October | 32.8°C10 Oct 1942 | -28.9°C30 Oct 1991 | 23 mm14 Oct 1962 | 57 mm1957 · driest 0 mm in 1952 | 80 |
| November | 27.8°C1 Nov 1947 | -37.2°C21 Nov 1978 | 25 mm13 Nov 2010 | 62 mm1958 · driest 0 mm in 1980 | 80 |
| December | 20.6°C1 Dec 1951 | -42.2°C24 Dec 1983 | 25 mm30 Dec 2010 | 52 mm1964 · driest 0 mm in 1978 | 82 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 | 3 |
| February | 0 | 0 | 27 | 0 | 3 |
| March | <1 | 0 | 28 | <1 | <1 |
| April | 2 | <1 | 18 | <1 | <1 |
| May | 8 | 2 | 6 | 1 | 0 |
| June | 15 | 5 | <1 | 2 | 0 |
| July | 24 | 16 | 0 | 1 | 0 |
| August | 25 | 16 | <1 | <1 | 0 |
| September | 12 | 5 | 4 | <1 | 0 |
| October | 3 | <1 | 19 | <1 | <1 |
| November | <1 | 0 | 27 | <1 | 2 |
| December | 0 | 0 | 30 | <1 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 10% | <1% | 7% | -9.5–3.3°C |
| February | <1% | 10% | <1% | 5% | -5.9–6.5°C |
| March | 3% | 10% | <1% | 5% | 0.4–11.3°C |
| April | 25% | 14% | 2% | 9% | 11.6–19.3°C |
| May | 53% | 22% | 4% | 23% | 18.6–24.6°C |
| June | 67% | 29% | 7% | 33% | 22.4–27.8°C |
| July | 83% | 17% | 4% | 12% | 27.8–32.6°C |
| August | 85% | 14% | 2% | 10% | 26.4–32.4°C |
| September | 67% | 14% | 3% | 10% | 20.0–26.5°C |
| October | 32% | 10% | 1% | 4% | 12.5–18.6°C |
| November | 2% | 10% | <1% | 5% | 2.0–10.8°C |
| December | <1% | 9% | <1% | 4% | -5.7–4.6°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 5668637
- NOAA station
- USC00243929 · HARLEM
- Station distance
- 6.5 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 18 usable years
- Daylight
- Calculated from latitude 48.48°, mid-month, sunrise to sunset including refraction. Not a station measurement.
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.