September
September · August · June
81climate match
United States · 1991–2020
Best time to visit
Beaman.
September leads for comfortable weather in Beaman: typically 24.4°C by day, 10.9°C at night, with 82 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.4°C
Typical low10.9°C
Rain in September82 mm
July
July · August · June
76climate match
September
September · May · October
72climate match
The weakest month is January, scoring 5 against September’s 81 — days reach only -2.1°C, 26° 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
5-2.1° / -11.5°
Feb
50.2° / -9.7°
Mar
117.8° / -3.2°
Apr
3815.8° / 2.9°
May
6421.9° / 9.6°
Jun
7126.9° / 15.2°
Jul
7028.7° / 17.2°
Aug
7527.3° / 15.5°
Sep
8124.4° / 10.9°
Oct
4816.5° / 4.1°
Nov
148.4° / -2.6°
Dec
50.6° / -8.9°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -2.1°C | -11.5°C | 13 mm | 2.6 | 9 h 25 | 5 | Good coverage |
| February | 0.2°C | -9.7°C | 13 mm | 3.1 | 10 h 30 | 5 | Good coverage |
| March | 7.8°C | -3.2°C | 38 mm | 5.4 | 11 h 48 | 11 | Good coverage |
| April | 15.8°C | 2.9°C | 91 mm | 8.6 | 13 h 18 | 38 | Good coverage |
| May | 21.9°C | 9.6°C | 126 mm | 9.9 | 14 h 33 | 64 | Good coverage |
| June | 26.9°C | 15.2°C | 129 mm | 9.8 | 15 h 15 | 71 | Good coverage |
| July | 28.7°C | 17.2°C | 84 mm | 7.1 | 14 h 58 | 70 | Good coverage |
| August | 27.3°C | 15.5°C | 101 mm | 7.8 | 13 h 53 | 75 | Good coverage |
| September | 24.4°C | 10.9°C | 82 mm | 7.1 | 12 h 26 | 81 | Good coverage |
| October | 16.5°C | 4.1°C | 64 mm | 6.9 | 10 h 59 | 48 | Good coverage |
| November | 8.4°C | -2.6°C | 41 mm | 4.8 | 9 h 44 | 14 | Good coverage |
| December | 0.6°C | -8.9°C | 26 mm | 3.5 | 9 h 06 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 18.3°C26 Jan 2002 | -33.2°C16 Jan 2009 | 21 mm22 Jan 2018 | 49 mm2017 · driest 0 mm in 2021 | 30 |
| February | 25.6°C26 Feb 2024 | -30.5°C16 Feb 2021 | 20 mm20 Feb 2004 | 32 mm2008 · driest 0 mm in 2019 | 30 |
| March | 31.1°C21 Mar 2026 | -26.6°C3 Mar 2014 | 50 mm6 Mar 2026 | 82 mm2007 · driest 4 mm in 2023 | 30 |
| April | 31.1°C15 Apr 2002 | -11.6°C7 Apr 2018 | 108 mm26 Apr 2009 | 171 mm2014 · driest 14 mm in 2021 | 30 |
| May | 37.8°C27 May 2018 | -5.6°C3 May 2005 | 124 mm26 May 2013 | 400 mm2013 · driest 35 mm in 2012 | 30 |
| June | 37.8°C27 Jun 2012 | 5.0°C1 Jun 2001 | 87 mm17 Jun 2026 | 243 mm2008 · driest 21 mm in 2012 | 30 |
| July | 38.9°C25 Jul 2012 | 6.7°C12 Jul 2008 | 83 mm6 Jul 2015 | 256 mm2025 · driest 22 mm in 2012 | 30 |
| August | 37.8°C23 Aug 2023 | 5.0°C31 Aug 2009 | 98 mm11 Aug 2016 | 235 mm2010 · driest 3 mm in 2013 | 29 |
| September | 37.8°C9 Sep 2013 | -2.7°C23 Sep 2012 | 81 mm3 Sep 2018 | 245 mm2018 · driest 19 mm in 2021 | 29 |
| October | 33.9°C3 Oct 1997 | -11.7°C27 Oct 1997 | 60 mm24 Oct 2021 | 155 mm2009 · driest 10 mm in 2010 | 30 |
| November | 26.7°C13 Nov 1999 | -21.6°C12 Nov 2019 | 103 mm4 Nov 2003 | 146 mm2003 · driest 3 mm in 2007 | 30 |
| December | 22.8°C15 Dec 2021 | -30.6°C25 Dec 2000 | 47 mm13 Dec 2015 | 115 mm2015 · driest 3 mm in 1998 | 30 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 |
| February | 0 | 0 | 26 | <1 |
| March | <1 | 0 | 23 | 1 |
| April | 3 | <1 | 9 | 3 |
| May | 10 | 2 | 1 | 4 |
| June | 21 | 8 | 0 | 4 |
| July | 28 | 12 | 0 | 3 |
| August | 25 | 7 | 0 | 3 |
| September | 15 | 4 | <1 | 3 |
| October | 3 | <1 | 9 | 2 |
| November | <1 | 0 | 21 | 1 |
| December | 0 | 0 | 29 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 8% | <1% | 4% | -4.8–0.3°C |
| February | <1% | 9% | 1% | 5% | -5.5–5.0°C |
| March | 8% | 18% | 4% | 17% | 3.8–12.7°C |
| April | 24% | 27% | 9% | 34% | 13.2–18.6°C |
| May | 48% | 31% | 13% | 41% | 20.3–24.5°C |
| June | 67% | 32% | 14% | 39% | 25.6–29.0°C |
| July | 76% | 24% | 9% | 23% | 27.1–29.9°C |
| August | 75% | 24% | 10% | 24% | 25.8–29.1°C |
| September | 68% | 22% | 8% | 24% | 22.4–26.9°C |
| October | 30% | 22% | 7% | 22% | 13.5–19.4°C |
| November | 6% | 16% | 5% | 9% | 4.5–11.6°C |
| December | <1% | 12% | 3% | 5% | -3.3–4.7°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 4847904
- NOAA station
- USW00094988 · MARSHALLTOWN MUNI AP
- Station distance
- 14.3 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 21 usable years
- Daylight
- Calculated from latitude 42.22°, 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.