September
September · May · June
79climate match
United States · 1991–2020
Best time to visit
Penns Grove.
September leads for comfortable weather in Penns Grove: typically 24.7°C by day, 15.5°C at night, with 130 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.7°C
Typical low15.5°C
Rain in September130 mm
August
August · July · June
76climate match
October
October · May · April
76climate match
The weakest month is January, scoring 5 against September’s 79 — days reach only 4.3°C, 20° below the 24°C the score treats as ideal.
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
54.3° / -3.6°
Feb
55.8° / -2.8°
Mar
1410.6° / 1.1°
Apr
4717° / 6.5°
May
7522.4° / 11.9°
Jun
6827.2° / 17.2°
Jul
5429.8° / 20.2°
Aug
6228.6° / 19.3°
Sep
7924.7° / 15.5°
Oct
5718.2° / 9°
Nov
3012.1° / 3.4°
Dec
56.9° / -0.9°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 4.3°C | -3.6°C | 92 mm | 8.7 | 9 h 39 | 5 | Strong coverage |
| February | 5.8°C | -2.8°C | 78 mm | 7.9 | 10 h 38 | 5 | Strong coverage |
| March | 10.6°C | 1.1°C | 115 mm | 9.6 | 11 h 49 | 14 | Strong coverage |
| April | 17°C | 6.5°C | 102 mm | 9.3 | 13 h 12 | 47 | Strong coverage |
| May | 22.4°C | 11.9°C | 96 mm | 9.1 | 14 h 20 | 75 | Strong coverage |
| June | 27.2°C | 17.2°C | 120 mm | 9.1 | 14 h 58 | 68 | Strong coverage |
| July | 29.8°C | 20.2°C | 128 mm | 8.5 | 14 h 43 | 54 | Strong coverage |
| August | 28.6°C | 19.3°C | 111 mm | 7.6 | 13 h 44 | 62 | Strong coverage |
| September | 24.7°C | 15.5°C | 130 mm | 7.7 | 12 h 24 | 79 | Strong coverage |
| October | 18.2°C | 9°C | 105 mm | 7.2 | 11 h 05 | 57 | Strong coverage |
| November | 12.1°C | 3.4°C | 85 mm | 6.8 | 9 h 56 | 30 | Strong coverage |
| December | 6.9°C | -0.9°C | 109 mm | 8.7 | 9 h 22 | 5 | Strong coverage |
What has changed
Penns Grove runs +0.6°C
on the 1961–1990 baseline.
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.
Jan
+0.9
Feb
+1.3
Mar
+0.7
Apr
+0.6
May
+0.2
Jun
+0.2
Jul
+1.2
Aug
+0.2
Sep
+0.3
Oct
+0.5
Nov
-0.3
Dec
+1.6
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.3°C26 Jan 1950 | -22.8°C17 Jan 1982 | 70 mm23 Jan 1998 | 215 mm1979 · driest 12 mm in 1955 | 94 |
| February | 23.3°C24 Feb 1985 | -26.1°C9 Feb 1934 | 66 mm11 Feb 2018 | 179 mm1979 · driest 6 mm in 2009 | 94 |
| March | 30.6°C30 Mar 1998 | -15.0°C10 Mar 1984 | 96 mm21 Mar 2000 | 245 mm2000 · driest 15 mm in 2006 | 95 |
| April | 34.4°C22 Apr 1985 | -7.2°C7 Apr 1982 | 125 mm30 Apr 2014 | 206 mm2014 · driest 14 mm in 1985 | 95 |
| May | 34.4°C18 May 1986 | -3.9°C10 May 2008 | 92 mm31 May 1993 | 209 mm1978 · driest 8 mm in 2023 | 95 |
| June | 36.7°C26 Jun 1952 | 4.4°C1 Jun 1945 | 121 mm27 Jun 1938 | 311 mm2006 · driest 7 mm in 1949 | 95 |
| July | 39.4°C10 Jul 1936 | 10.0°C1 Jul 1943 | 179 mm9 Jul 1952 | 378 mm1989 · driest 17 mm in 1955 | 94 |
| August | 37.8°C9 Aug 2001 | 6.1°C29 Aug 1982 | 163 mm1 Aug 1945 | 375 mm2011 · driest 7 mm in 2025 | 94 |
| September | 36.1°C1 Sep 1932 | 0.0°C27 Sep 1940 | 236 mm16 Sep 1999 | 356 mm1999 · driest 11 mm in 1943 | 93 |
| October | 34.4°C5 Oct 1941 | -5.0°C28 Oct 1936 | 106 mm10 Oct 1971 | 232 mm1995 · driest 0 mm in 2024 | 94 |
| November | 28.9°C1 Nov 1950 | -11.1°C26 Nov 1938 | 85 mm17 Nov 1935 | 236 mm1977 · driest 9 mm in 1976 | 94 |
| December | 22.8°C29 Dec 1984 | -18.3°C25 Dec 1983 | 71 mm12 Dec 1983 | 254 mm1983 · driest 0 mm in 2017 | 93 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 23 | 3 | 2 |
| February | 0 | 0 | 21 | 3 | 2 |
| March | <1 | 0 | 13 | 4 | <1 |
| April | 3 | <1 | 1 | 3 | <1 |
| May | 10 | 3 | <1 | 3 | 0 |
| June | 22 | 9 | 0 | 4 | 0 |
| July | 29 | 16 | 0 | 4 | 0 |
| August | 28 | 12 | 0 | 3 | 0 |
| September | 15 | 3 | 0 | 4 | 0 |
| October | 3 | <1 | <1 | 3 | 0 |
| November | <1 | 0 | 7 | 3 | 0 |
| December | 0 | 0 | 19 | 4 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 28% | 10% | 31% | 0.8–7.6°C |
| February | <1% | 27% | 9% | 29% | 2.5–8.6°C |
| March | 6% | 30% | 12% | 35% | 7.8–13.6°C |
| April | 23% | 30% | 11% | 36% | 14.8–18.9°C |
| May | 53% | 31% | 12% | 36% | 20.4–24.5°C |
| June | 70% | 29% | 12% | 31% | 25.4–28.6°C |
| July | 73% | 27% | 11% | 27% | 27.9–31.1°C |
| August | 75% | 25% | 11% | 24% | 26.9–30.0°C |
| September | 69% | 23% | 10% | 24% | 23.4–26.6°C |
| October | 34% | 21% | 9% | 19% | 16.9–21.0°C |
| November | 6% | 25% | 10% | 23% | 10.1–14.6°C |
| December | <1% | 27% | 11% | 29% | 3.2–9.2°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 4503544
- NOAA station
- USC00079605 · WILMINGTON PORTER RSCH
- Station distance
- 8 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 39.73°, 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.