September
September · August · June
77climate match
United States · 1991–2020
Best time to visit
Morrisville.
September leads for comfortable weather in Morrisville: typically 24.9°C by day, 10.7°C at night, with 92 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.9°C
Typical low10.7°C
Rain in September92 mm
July
July · August · June
65climate match
October
October · September · May
70climate match
The weakest month is January, scoring 5 against September’s 77 — days reach only 3.6°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
53.6° / -7°
Feb
55.3° / -6.2°
Mar
810.5° / -2.6°
Apr
4217.6° / 2.4°
May
6522.7° / 8.3°
Jun
7126.6° / 13.3°
Jul
6728.7° / 15.8°
Aug
7328.1° / 14.9°
Sep
7724.9° / 10.7°
Oct
5018.4° / 4.3°
Nov
2011.7° / -1°
Dec
56° / -4.1°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 3.6°C | -7°C | 86 mm | 11.2 | 9 h 38 | 5 | Strong coverage |
| February | 5.3°C | -6.2°C | 73 mm | 9.8 | 10 h 37 | 5 | Strong coverage |
| March | 10.5°C | -2.6°C | 95 mm | 10.9 | 11 h 49 | 8 | Strong coverage |
| April | 17.6°C | 2.4°C | 87 mm | 11.1 | 13 h 12 | 42 | Strong coverage |
| May | 22.7°C | 8.3°C | 109 mm | 12.2 | 14 h 21 | 65 | Strong coverage |
| June | 26.6°C | 13.3°C | 107 mm | 11.3 | 14 h 59 | 71 | Strong coverage |
| July | 28.7°C | 15.8°C | 107 mm | 9.6 | 14 h 44 | 67 | Strong coverage |
| August | 28.1°C | 14.9°C | 95 mm | 8.6 | 13 h 44 | 73 | Strong coverage |
| September | 24.9°C | 10.7°C | 92 mm | 8.4 | 12 h 24 | 77 | Strong coverage |
| October | 18.4°C | 4.3°C | 81 mm | 9.2 | 11 h 05 | 50 | Strong coverage |
| November | 11.7°C | -1°C | 74 mm | 9 | 9 h 55 | 20 | Strong coverage |
| December | 6°C | -4.1°C | 84 mm | 10.3 | 9 h 21 | 5 | Strong coverage |
What has changed
Morrisville runs +0.5°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
+0.2
Feb
+1.6
Mar
+0.5
Apr
+0.7
May
+0.5
Jun
-0.2
Jul
+0.2
Aug
-0.1
Sep
+0.5
Oct
+0.3
Nov
-0.4
Dec
+1.6
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.9°C24 Jan 1999 | -31.7°C29 Jan 1963 | 40 mm3 Jan 1999 | 171 mm1999 · driest 20 mm in 1967 | 64 |
| February | 25.6°C21 Feb 2018 | -26.7°C1 Feb 2026 | 57 mm17 Feb 2003 | 179 mm2018 · driest 12 mm in 1968 | 64 |
| March | 30.0°C23 Mar 2026 | -22.2°C7 Mar 2015 | 68 mm29 Mar 2005 | 202 mm1994 · driest 28 mm in 1990 | 64 |
| April | 32.2°C19 Apr 1976 | -10.0°C4 Apr 2013 | 59 mm12 Apr 2024 | 197 mm2024 · driest 27 mm in 1971 | 64 |
| May | 33.3°C17 May 1962 | -5.6°C4 May 2002 | 64 mm6 May 1971 | 201 mm1968 · driest 30 mm in 1993 | 66 |
| June | 36.7°C30 Jun 2012 | -0.6°C11 Jun 1972 | 69 mm24 Jun 2017 | 208 mm1972 · driest 26 mm in 1999 | 66 |
| July | 38.9°C17 Jul 1988 | 3.3°C1 Jul 1988 | 79 mm29 Jul 2017 | 278 mm1969 · driest 18 mm in 1975 | 64 |
| August | 37.8°C27 Aug 1948 | 1.1°C29 Aug 1982 | 104 mm31 Aug 1975 | 215 mm1975 · driest 13 mm in 2015 | 65 |
| September | 34.4°C2 Sep 1973 | -3.3°C24 Sep 1963 | 86 mm10 Sep 2018 | 327 mm2018 · driest 13 mm in 1963 | 64 |
| October | 32.2°C2 Oct 2019 | -8.9°C30 Oct 1965 | 64 mm30 Oct 2012 | 149 mm1976 · driest 6 mm in 1963 | 65 |
| November | 28.9°C5 Nov 1948 | -16.7°C30 Nov 1976 | 74 mm27 Nov 1985 | 340 mm1985 · driest 17 mm in 2012 | 65 |
| December | 25.0°C4 Dec 1982 | -26.7°C22 Dec 1989 | 77 mm3 Dec 1991 | 154 mm2008 · driest 15 mm in 1965 | 65 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 3 | 8 |
| February | <1 | 0 | 25 | 2 | 6 |
| March | <1 | 0 | 22 | 3 | 3 |
| April | 5 | <1 | 11 | 3 | <1 |
| May | 12 | 2 | 2 | 4 | 0 |
| June | 21 | 6 | 0 | 4 | 0 |
| July | 28 | 12 | 0 | 4 | 0 |
| August | 27 | 9 | 0 | 3 | 0 |
| September | 16 | 4 | <1 | 3 | 0 |
| October | 5 | <1 | 7 | 3 | <1 |
| November | <1 | 0 | 19 | 2 | 1 |
| December | 0 | 0 | 25 | 3 | 5 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 35% | 8% | 48% | 0.0–6.7°C |
| February | 2% | 33% | 7% | 44% | 1.5–8.9°C |
| March | 9% | 35% | 10% | 48% | 7.5–14.4°C |
| April | 24% | 36% | 10% | 48% | 14.8–19.4°C |
| May | 46% | 37% | 12% | 51% | 20.1–25.5°C |
| June | 63% | 34% | 12% | 41% | 25.3–28.1°C |
| July | 68% | 32% | 12% | 37% | 27.1–30.3°C |
| August | 72% | 28% | 10% | 32% | 26.6–29.5°C |
| September | 64% | 28% | 9% | 33% | 23.2–26.8°C |
| October | 33% | 29% | 8% | 33% | 16.3–20.7°C |
| November | 9% | 32% | 8% | 41% | 8.8–14.9°C |
| December | 1% | 33% | 8% | 42% | 2.2–9.7°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 4559761
- NOAA station
- USC00369367 · WAYNESBURG 1 E
- Station distance
- 0.5 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 39.89°, 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.