September
September · June · May
United States · 1991–2020
September leads for comfortable weather in Holland: typically 24.4°C by day, 11.4°C at night, with 123 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · May
July · August · June
May · October · September
The weakest month is January, scoring 5 against September’s 77 — days reach only 3.8°C, 20° below the 24°C the score treats as ideal, and nights drop to -7.7°C.
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 | 3.8°C | -7.7°C | 89 mm | 6.9 | 9 h 34 | 5 | Strong coverage |
| February | 5.6°C | -6.6°C | 72 mm | 6.1 | 10 h 35 | 5 | Strong coverage |
| March | 9.9°C | -3°C | 98 mm | 6.7 | 11 h 49 | 9 | Strong coverage |
| April | 17°C | 2.8°C | 93 mm | 6.9 | 13 h 14 | 44 | Good coverage |
| May | 22.3°C | 8.5°C | 92 mm | 7.7 | 14 h 25 | 71 | Good coverage |
| June | 26.8°C | 13.9°C | 115 mm | 8.4 | 15 h 03 | 73 | Strong coverage |
| July | 29.4°C | 16.7°C | 133 mm | 7.3 | 14 h 48 | 61 | Strong coverage |
| August | 28.1°C | 15.5°C | 123 mm | 7.1 | 13 h 47 | 70 | Strong coverage |
| September | 24.4°C | 11.4°C | 123 mm | 6.4 | 12 h 25 | 77 | Strong coverage |
| October | 18.4°C | 4.7°C | 99 mm | 6.3 | 11 h 03 | 51 | Strong coverage |
| November | 12.3°C | -1.1°C | 78 mm | 5.8 | 9 h 52 | 24 | Strong coverage |
| December | 6.3°C | -4.7°C | 111 mm | 7.1 | 9 h 17 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.6°C30 Jan 2002 | -30.6°C21 Jan 1994 | 75 mm24 Jan 1979 | 293 mm1979 · driest 0 mm in 2023 | 40 |
| February | 25.6°C22 Feb 2018 | -28.3°C5 Feb 1996 | 80 mm13 Feb 2008 | 171 mm2008 · driest 0 mm in 2023 | 39 |
| March | 31.1°C31 Mar 1998 | -21.7°C3 Mar 2014 | 71 mm16 Mar 2010 | 208 mm1980 · driest 2 mm in 2023 | 41 |
| April | 34.4°C18 Apr 2002 | -9.4°C7 Apr 1982 | 120 mm16 Apr 2007 | 244 mm1983 · driest 0 mm in 2022 | 40 |
| May | 34.4°C21 May 1996 | -2.8°C11 May 2010 | 82 mm11 May 1981 | 249 mm1984 · driest 0 mm in 2022 | 40 |
| June | 35.6°C3 Jun 2023 | 2.2°C3 Jun 1986 | 99 mm28 Jun 2006 | 293 mm2006 · driest 5 mm in 2023 | 40 |
| July | 38.3°C7 Jul 2010 | 6.7°C2 Jul 2007 | 95 mm14 Jul 2010 | 279 mm2004 · driest 15 mm in 1999 | 39 |
| August | 37.8°C3 Aug 2002 | 3.9°C29 Aug 1982 | 227 mm29 Aug 2011 | 370 mm2011 · driest 18 mm in 1992 | 40 |
| September | 36.7°C10 Sep 1983 | -0.6°C29 Sep 2000 | 170 mm2 Sep 2021 | 299 mm2011 · driest 0 mm in 2015 | 40 |
| October | 33.9°C2 Oct 2019 | -7.2°C31 Oct 2011 | 141 mm1 Oct 2010 | 237 mm1995 · driest 3 mm in 2018 | 40 |
| November | 26.7°C2 Nov 1982 | -13.3°C30 Nov 2013 | 92 mm29 Nov 1993 | 180 mm1985 · driest 4 mm in 2022 | 40 |
| December | 23.9°C29 Dec 1984 | -22.8°C15 Dec 2005 | 111 mm18 Dec 2000 | 243 mm1996 · driest 0 mm in 2022 | 40 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 26 | 3 | 2 |
| February | 0 | 0 | 24 | 2 | 2 |
| March | <1 | 0 | 21 | 3 | 1 |
| April | 3 | <1 | 9 | 3 | <1 |
| May | 10 | 3 | 2 | 3 | 0 |
| June | 21 | 8 | 0 | 4 | 0 |
| July | 27 | 15 | 0 | 4 | 0 |
| August | 25 | 9 | 0 | 3 | 0 |
| September | 14 | 3 | <1 | 3 | 0 |
| October | 3 | <1 | 6 | 2 | 0 |
| November | <1 | 0 | 18 | 2 | <1 |
| December | 0 | 0 | 24 | 3 | 1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 23% | 10% | 22% | -0.3–6.6°C |
| February | <1% | 24% | 9% | 18% | 1.8–8.3°C |
| March | 6% | 23% | 11% | 25% | 7.0–12.7°C |
| April | 26% | 25% | 11% | 27% | 14.5–18.8°C |
| May | 53% | 28% | 11% | 31% | 20.1–24.1°C |
| June | 69% | 28% | 13% | 27% | 24.6–28.3°C |
| July | 75% | 25% | 13% | 25% | 27.0–31.2°C |
| August | 77% | 22% | 10% | 14% | 26.4–30.2°C |
| September | 70% | 21% | 11% | 19% | 22.7–26.5°C |
| October | 31% | 22% | 9% | 18% | 16.1–20.7°C |
| November | 6% | 22% | 9% | 16% | 9.8–14.8°C |
| December | <1% | 25% | 11% | 22% | 2.7–9.7°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