September
September · June · May
78climate match
United States · 1991–2020
Best time to visit
Montoursville.
September leads for comfortable weather in Montoursville: typically 24.1°C by day, 12.3°C at night, with 121 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.1°C
Typical low12.3°C
Rain in September121 mm
August
August · July · June
67climate match
May
May · October · September
71climate match
The weakest month is January, scoring 5 against September’s 78 — days reach only 1.9°C, 22° 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
51.9° / -6.6°
Feb
53.8° / -5.9°
Mar
109.2° / -1.6°
Apr
4216.6° / 3.9°
May
7022.6° / 9.5°
Jun
7427.1° / 14.6°
Jul
6129.5° / 17.1°
Aug
6928.3° / 16.3°
Sep
7824.1° / 12.3°
Oct
4917.4° / 6°
Nov
1910.4° / 0.6°
Dec
54.4° / -3.5°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 1.9°C | -6.6°C | 75 mm | 8.4 | 9 h 30 | 5 | Strong coverage |
| February | 3.8°C | -5.9°C | 59 mm | 7.2 | 10 h 33 | 5 | Strong coverage |
| March | 9.2°C | -1.6°C | 80 mm | 8.8 | 11 h 48 | 10 | Strong coverage |
| April | 16.6°C | 3.9°C | 92 mm | 9.7 | 13 h 15 | 42 | Strong coverage |
| May | 22.6°C | 9.5°C | 98 mm | 10.6 | 14 h 28 | 70 | Strong coverage |
| June | 27.1°C | 14.6°C | 98 mm | 9.9 | 15 h 08 | 74 | Strong coverage |
| July | 29.5°C | 17.1°C | 118 mm | 9.4 | 14 h 52 | 61 | Strong coverage |
| August | 28.3°C | 16.3°C | 106 mm | 8.1 | 13 h 49 | 69 | Strong coverage |
| September | 24.1°C | 12.3°C | 121 mm | 8.2 | 12 h 25 | 78 | Strong coverage |
| October | 17.4°C | 6°C | 92 mm | 7.9 | 11 h 02 | 49 | Strong coverage |
| November | 10.4°C | 0.6°C | 82 mm | 7.3 | 9 h 49 | 19 | Strong coverage |
| December | 4.4°C | -3.5°C | 83 mm | 8.4 | 9 h 13 | 5 | Strong coverage |
What has changed
Montoursville runs +1.4°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
+1.6
Feb
+2.0
Mar
+1.3
Apr
+1.2
May
+1.2
Jun
+1.2
Jul
+1.9
Aug
+1.1
Sep
+1.8
Oct
+1.4
Nov
+0.7
Dec
+2.0
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C25 Jan 1967 | -28.9°C21 Jan 1994 | 74 mm25 Jan 2010 | 210 mm1978 · driest 13 mm in 1985 | 78 |
| February | 24.4°C24 Feb 2017 | -25.0°C1 Feb 1971 | 69 mm13 Feb 1971 | 214 mm1981 · driest 15 mm in 1968 | 78 |
| March | 30.6°C31 Mar 1998 | -18.9°C10 Mar 1996 | 68 mm10 Mar 2011 | 185 mm2011 · driest 22 mm in 1995 | 78 |
| April | 34.4°C27 Apr 2009 | -9.4°C7 Apr 1982 | 71 mm30 Apr 2020 | 255 mm2011 · driest 18 mm in 1989 | 78 |
| May | 35.6°C20 May 1996 | -2.2°C14 May 1996 | 69 mm3 May 1954 | 196 mm2018 · driest 11 mm in 2023 | 79 |
| June | 38.9°C26 Jun 1952 | 2.2°C3 Jun 1986 | 220 mm22 Jun 1972 | 427 mm1972 · driest 17 mm in 1966 | 79 |
| July | 39.4°C16 Jul 1988 | 6.1°C9 Jul 1963 | 84 mm30 Jul 2000 | 305 mm2018 · driest 25 mm in 1955 | 79 |
| August | 37.8°C5 Aug 1955 | 3.3°C30 Aug 1965 | 110 mm29 Aug 1988 | 236 mm2018 · driest 24 mm in 1995 | 78 |
| September | 38.9°C3 Sep 1953 | -1.1°C24 Sep 1963 | 172 mm7 Sep 2011 | 406 mm2011 · driest 13 mm in 1964 | 78 |
| October | 32.8°C5 Oct 1951 | -6.7°C20 Oct 1972 | 111 mm14 Oct 1955 | 244 mm1990 · driest 5 mm in 1963 | 78 |
| November | 28.3°C1 Nov 1950 | -13.3°C30 Nov 1976 | 94 mm29 Nov 2005 | 206 mm1972 · driest 17 mm in 2012 | 78 |
| December | 21.1°C1 Dec 2006 | -26.1°C28 Dec 1950 | 84 mm13 Dec 1983 | 187 mm1973 · driest 18 mm in 1989 | 78 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 27 | 2 | 8 |
| February | 0 | 0 | 25 | 2 | 6 |
| March | <1 | <1 | 21 | 3 | 3 |
| April | 3 | <1 | 7 | 3 | <1 |
| May | 11 | 4 | <1 | 3 | 0 |
| June | 22 | 8 | 0 | 4 | 0 |
| July | 29 | 15 | 0 | 4 | 0 |
| August | 27 | 10 | 0 | 3 | 0 |
| September | 13 | 3 | 0 | 3 | 0 |
| October | 2 | <1 | 3 | 3 | <1 |
| November | 0 | 0 | 15 | 3 | 1 |
| December | 0 | 0 | 24 | 3 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 28% | 7% | 32% | -1.3–4.7°C |
| February | <1% | 28% | 8% | 32% | 0.4–6.6°C |
| March | 5% | 30% | 9% | 39% | 6.1–12.3°C |
| April | 22% | 33% | 10% | 42% | 13.9–18.5°C |
| May | 49% | 34% | 11% | 46% | 19.7–24.6°C |
| June | 66% | 32% | 11% | 40% | 25.2–28.7°C |
| July | 70% | 30% | 12% | 35% | 27.2–31.6°C |
| August | 72% | 27% | 10% | 29% | 26.4–30.0°C |
| September | 62% | 26% | 10% | 30% | 22.0–25.8°C |
| October | 27% | 25% | 9% | 26% | 15.3–19.5°C |
| November | 4% | 28% | 10% | 32% | 7.2–12.8°C |
| December | <1% | 28% | 9% | 31% | 0.7–6.6°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 5201801
- NOAA station
- USW00014778 · WILLIAMSPORT RGNL AP
- Station distance
- 1.2 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 30 usable years
- Daylight
- Calculated from latitude 41.25°, 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.