September
September · June · August
81climate match
United States · 1991–2020
Best time to visit
Pierce.
September leads for comfortable weather in Pierce: typically 23°C by day, 7.8°C at night, with 44 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high23°C
Typical low7.8°C
Rain in September44 mm
August
August · July · June
69climate match
September
September · May · June
83climate match
The weakest month is January, scoring 5 against September’s 81 — days reach only -4.9°C, 29° 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
5-4.9° / -16.5°
Feb
5-2.3° / -13.8°
Mar
55° / -7.2°
Apr
3413.3° / -0.9°
May
6220.2° / 5.8°
Jun
7725.5° / 11.7°
Jul
7129.3° / 14.5°
Aug
7528.6° / 13.2°
Sep
8123° / 7.8°
Oct
3813.9° / 0.3°
Nov
54.8° / -7.1°
Dec
5-2.4° / -13.3°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -4.9°C | -16.5°C | 12 mm | 3.2 | 8 h 55 | 5 | Strong coverage |
| February | -2.3°C | -13.8°C | 13 mm | 3.7 | 10 h 13 | 5 | Strong coverage |
| March | 5°C | -7.2°C | 21 mm | 4.4 | 11 h 45 | 5 | Strong coverage |
| April | 13.3°C | -0.9°C | 34 mm | 5.5 | 13 h 31 | 34 | Strong coverage |
| May | 20.2°C | 5.8°C | 63 mm | 8.2 | 15 h 00 | 62 | Strong coverage |
| June | 25.5°C | 11.7°C | 85 mm | 8.8 | 15 h 50 | 77 | Strong coverage |
| July | 29.3°C | 14.5°C | 78 mm | 8 | 15 h 30 | 71 | Strong coverage |
| August | 28.6°C | 13.2°C | 64 mm | 6 | 14 h 12 | 75 | Strong coverage |
| September | 23°C | 7.8°C | 44 mm | 4.8 | 12 h 29 | 81 | Strong coverage |
| October | 13.9°C | 0.3°C | 36 mm | 5 | 10 h 48 | 38 | Strong coverage |
| November | 4.8°C | -7.1°C | 17 mm | 3.6 | 9 h 18 | 5 | Strong coverage |
| December | -2.4°C | -13.3°C | 15 mm | 4 | 8 h 33 | 5 | Strong coverage |
What has changed
Pierce runs +1.2°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
+2.9
Feb
+0.5
Mar
+1.8
Apr
-0.5
May
+0.7
Jun
+1.6
Jul
+0.6
Aug
+0.1
Sep
+2.8
Oct
-0.2
Nov
+1.5
Dec
+2.2
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 17.2°C8 Jan 2002 | -42.2°C15 Jan 2009 | 17 mm21 Jan 1952 | 33 mm1969 · driest 1 mm in 1961 | 79 |
| February | 22.8°C27 Feb 2016 | -41.7°C9 Feb 1994 | 26 mm25 Feb 2000 | 44 mm2000 · driest 1 mm in 1985 | 79 |
| March | 27.2°C25 Mar 2007 | -35.0°C10 Mar 1948 | 32 mm3 Mar 1966 | 81 mm1975 · driest 2 mm in 2021 | 79 |
| April | 33.9°C30 Apr 1992 | -24.4°C1 Apr 1975 | 50 mm5 Apr 1997 | 139 mm1975 · driest 0 mm in 1952 | 79 |
| May | 36.1°C12 May 2025 | -9.4°C3 May 1967 | 50 mm30 May 2007 | 187 mm2013 · driest 6 mm in 2017 | 79 |
| June | 43.9°C29 Jun 2002 | -1.1°C2 Jun 1969 | 81 mm15 Jun 2009 | 202 mm2009 · driest 13 mm in 1974 | 79 |
| July | 44.4°C30 Jul 2006 | 1.7°C30 Jul 1971 | 110 mm15 Jul 1993 | 349 mm1993 · driest 5 mm in 1968 | 79 |
| August | 41.7°C9 Aug 1958 | 0.6°C12 Aug 1964 | 118 mm21 Aug 1998 | 236 mm1998 · driest 0 mm in 2001 | 78 |
| September | 40.6°C8 Sep 1959 | -11.7°C30 Sep 1974 | 110 mm15 Sep 1994 | 176 mm1977 · driest 1 mm in 1948 | 78 |
| October | 35.0°C1 Oct 1953 | -23.3°C31 Oct 1991 | 43 mm4 Oct 2013 | 120 mm2013 · driest 1 mm in 1993 | 78 |
| November | 26.1°C7 Nov 1999 | -34.4°C29 Nov 1985 | 31 mm10 Nov 2022 | 57 mm2008 · driest 0 mm in 1963 | 78 |
| December | 18.9°C6 Dec 2023 | -41.7°C31 Dec 1967 | 30 mm25 Dec 2016 | 52 mm2016 · driest 1 mm in 1986 | 78 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 31 | <1 | 10 |
| February | 0 | 0 | 28 | <1 | 9 |
| March | <1 | 0 | 28 | <1 | 6 |
| April | 2 | <1 | 18 | 1 | 3 |
| May | 8 | 2 | 4 | 2 | <1 |
| June | 18 | 6 | <1 | 3 | 0 |
| July | 26 | 14 | 0 | 3 | 0 |
| August | 25 | 13 | 0 | 2 | 0 |
| September | 12 | 5 | 2 | 1 | 0 |
| October | 2 | <1 | 15 | 1 | 1 |
| November | <1 | 0 | 28 | <1 | 6 |
| December | 0 | 0 | 31 | <1 | 9 |
The best month has moved. On the 1961–1990 numbers the strongest month here was June (scoring 84); on 2011–2025 it is September (86). Both are scored the same way, from the same station — only the climate underneath changed.
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 12% | <1% | 7% | -11.9–-0.9°C |
| February | <1% | 12% | <1% | 8% | -7.5–2.9°C |
| March | 3% | 13% | 1% | 9% | -1.5–9.2°C |
| April | 18% | 19% | 4% | 18% | 8.9–16.7°C |
| May | 45% | 24% | 6% | 27% | 17.4–23.0°C |
| June | 65% | 28% | 8% | 34% | 22.5–28.2°C |
| July | 77% | 23% | 7% | 21% | 27.2–32.1°C |
| August | 79% | 18% | 5% | 13% | 25.6–31.2°C |
| September | 60% | 16% | 4% | 12% | 19.6–25.7°C |
| October | 25% | 13% | 3% | 10% | 11.7–17.2°C |
| November | 2% | 12% | 1% | 8% | 0.5–9.0°C |
| December | 0% | 13% | <1% | 9% | -8.0–1.9°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 5691030
- NOAA station
- USW00024011 · BISMARCK
- Station distance
- 5.6 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 30 usable years
- Daylight
- Calculated from latitude 46.79°, 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.