September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Walton Park: typically 24.3°C by day, 11°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
July · August · June
May · September · October
The weakest month is January, scoring 5 against September’s 79 — days reach only 2°C, 22° below the 24°C the score treats as ideal.
Month by month
The bars show the comfort score. Day and night temperatures come from daily observed highs and lows; rain is the historical monthly estimate.
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 2°C | -8°C | 61 mm | 7.8 | 9 h 30 | 5 | Good coverage |
| February | 3.8°C | -7.2°C | 63 mm | 7.7 | 10 h 33 | 5 | Good coverage |
| March | 8.8°C | -2.8°C | 80 mm | 8.7 | 11 h 48 | 6 | Good coverage |
| April | 16°C | 2.6°C | 85 mm | 8.7 | 13 h 15 | 39 | Good coverage |
| May | 21.9°C | 8.4°C | 89 mm | 10.3 | 14 h 28 | 67 | Good coverage |
| June | 26.4°C | 13.4°C | 109 mm | 9.4 | 15 h 08 | 73 | Good coverage |
| July | 29.2°C | 16.2°C | 89 mm | 8.8 | 14 h 53 | 68 | Good coverage |
| August | 28.1°C | 15.3°C | 105 mm | 8.4 | 13 h 50 | 71 | Good coverage |
| September | 24.3°C | 11°C | 97 mm | 7.3 | 12 h 25 | 79 | Good coverage |
| October | 17.4°C | 4.9°C | 99 mm | 7.6 | 11 h 01 | 47 | Good coverage |
| November | 11.1°C | -0.5°C | 71 mm | 7.2 | 9 h 48 | 21 | Good coverage |
| December | 4.7°C | -4.8°C | 81 mm | 8.7 | 9 h 12 | 5 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C6 Jan 2007 | -27.2°C28 Jan 2005 | 38 mm24 Jan 2019 | 125 mm2005 · driest 17 mm in 2026 | 29 |
| February | 24.4°C24 Feb 2017 | -24.9°C24 Feb 2015 | 70 mm13 Feb 2008 | 208 mm2008 · driest 17 mm in 2026 | 29 |
| March | 30.6°C31 Mar 1998 | -22.8°C7 Mar 2003 | 61 mm23 Mar 2024 | 171 mm2010 · driest 15 mm in 2006 | 29 |
| April | 33.9°C17 Apr 2002 | -7.8°C7 Apr 2002 | 105 mm15 Apr 2007 | 222 mm2007 · driest 33 mm in 1999 | 29 |
| May | 34.4°C19 May 2026 | -3.2°C1 May 2008 | 64 mm31 May 2025 | 227 mm2025 · driest 28 mm in 2023 | 29 |
| June | 36.1°C24 Jun 2025 | 0.6°C1 Jun 2001 | 89 mm26 Jun 2023 | 282 mm2009 · driest 16 mm in 1999 | 29 |
| July | 38.3°C2 Jul 2026 | 5.0°C3 Jul 2001 | 97 mm9 Jul 2023 | 267 mm2023 · driest 27 mm in 2022 | 29 |
| August | 36.7°C13 Aug 2005 | 6.1°C31 Aug 2025 | 153 mm28 Aug 2011 | 344 mm2011 · driest 3 mm in 2025 | 28 |
| September | 35.6°C8 Sep 2015 | -1.7°C29 Sep 2000 | 143 mm1 Sep 2021 | 357 mm2011 · driest 14 mm in 2014 | 28 |
| October | 31.7°C8 Oct 2007 | -6.1°C29 Oct 2001 | 172 mm8 Oct 2005 | 340 mm2005 · driest 5 mm in 2024 | 28 |
| November | 26.7°C6 Nov 2024 | -13.8°C23 Nov 2018 | 58 mm30 Nov 2020 | 196 mm2018 · driest 8 mm in 2012 | 28 |
| December | 23.9°C7 Dec 1998 | -22.8°C14 Dec 2005 | 64 mm17 Dec 2000 | 172 mm2023 · driest 22 mm in 2006 | 28 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) |
|---|---|---|---|---|
| January | 0 | 0 | 28 | 2 |
| February | 0 | 0 | 26 | 2 |
| March | <1 | <1 | 22 | 3 |
| April | 3 | <1 | 10 | 3 |
| May | 10 | 3 | 1 | 3 |
| June | 20 | 7 | 0 | 3 |
| July | 28 | 14 | 0 | 3 |
| August | 26 | 9 | 0 | 3 |
| September | 14 | 3 | <1 | 3 |
| October | 3 | <1 | 5 | 3 |
| November | <1 | 0 | 18 | 3 |
| December | 0 | 0 | 26 | 3 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 25% | 7% | 25% | -0.8–4.9°C |
| February | <1% | 27% | 7% | 33% | 0.7–6.7°C |
| March | 5% | 29% | 9% | 34% | 5.3–12.0°C |
| April | 21% | 30% | 9% | 40% | 13.5–17.9°C |
| May | 50% | 33% | 11% | 42% | 19.9–23.7°C |
| June | 68% | 30% | 11% | 38% | 24.8–27.7°C |
| July | 70% | 29% | 10% | 34% | 27.1–30.6°C |
| August | 72% | 28% | 11% | 30% | 26.6–29.8°C |
| September | 66% | 26% | 10% | 30% | 22.7–25.8°C |
| October | 28% | 24% | 9% | 21% | 15.8–19.3°C |
| November | 5% | 24% | 8% | 25% | 9.0–13.6°C |
| December | <1% | 28% | 10% | 32% | 2.0–7.8°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