September
September · June · August
United States · 1991–2020
September leads for comfortable weather in Wellington: typically 25.1°C by day, 8.2°C at night, with 34 mm of rain. Based on measured 1991–2020 NOAA station history.
September · June · August
August · July · June
May · September · October
The weakest month is January, scoring 5 against September’s 82 — days reach only 6°C, 18° below the 24°C the score treats as ideal, and nights drop to -9.2°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 | 6°C | -9.2°C | 10 mm | 2.4 | 9 h 33 | 5 | Strong coverage |
| February | 7.2°C | -7.6°C | 11 mm | 2.9 | 10 h 35 | 5 | Strong coverage |
| March | 12.8°C | -3.1°C | 28 mm | 4.1 | 11 h 49 | 30 | Strong coverage |
| April | 16.2°C | 0.9°C | 51 mm | 6.1 | 13 h 14 | 44 | Strong coverage |
| May | 21.1°C | 6.2°C | 65 mm | 8.2 | 14 h 25 | 66 | Strong coverage |
| June | 27.4°C | 11.1°C | 45 mm | 5.9 | 15 h 04 | 78 | Strong coverage |
| July | 30.9°C | 14.2°C | 40 mm | 5.4 | 14 h 49 | 73 | Strong coverage |
| August | 29.5°C | 13°C | 34 mm | 4.9 | 13 h 47 | 76 | Strong coverage |
| September | 25.1°C | 8.2°C | 34 mm | 4.9 | 12 h 25 | 82 | Strong coverage |
| October | 17.5°C | 1.3°C | 29 mm | 4.3 | 11 h 03 | 53 | Strong coverage |
| November | 10.6°C | -4.5°C | 18 mm | 3.3 | 9 h 51 | 21 | Strong coverage |
| December | 5.6°C | -9.1°C | 9 mm | 2.8 | 9 h 16 | 5 | Strong coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.3°C26 Jan 2015 | -26.1°C1 Jan 1995 | 20 mm7 Jan 1992 | 27 mm1992 · driest 0 mm in 2020 | 30 |
| February | 23.3°C10 Feb 2017 | -32.2°C3 Feb 1996 | 13 mm1 Feb 2016 | 24 mm2010 · driest 0 mm in 1991 | 31 |
| March | 27.8°C26 Mar 2012 | -25.0°C4 Mar 2019 | 58 mm18 Mar 2003 | 106 mm1992 · driest 0 mm in 2012 | 31 |
| April | 31.1°C30 Apr 1992 | -16.7°C17 Apr 2020 | 54 mm30 Apr 1999 | 207 mm1999 · driest 4 mm in 2002 | 30 |
| May | 35.6°C29 May 2003 | -9.4°C2 May 2013 | 52 mm8 May 2015 | 180 mm1995 · driest 19 mm in 2006 | 30 |
| June | 39.4°C24 Jun 2012 | 1.1°C6 Jun 1998 | 41 mm5 Jun 2008 | 106 mm2009 · driest 2 mm in 2006 | 30 |
| July | 39.4°C21 Jul 2005 | 6.7°C8 Jul 1994 | 55 mm20 Jul 2009 | 96 mm2009 · driest 2 mm in 2003 | 30 |
| August | 37.2°C16 Aug 2002 | 3.9°C27 Aug 1992 | 70 mm2 Aug 2007 | 107 mm1997 · driest 2 mm in 2012 | 30 |
| September | 37.8°C2 Sep 2019 | -5.0°C22 Sep 1995 | 32 mm12 Sep 2013 | 154 mm2013 · driest 1 mm in 1992 | 30 |
| October | 31.7°C16 Oct 1991 | -20.6°C27 Oct 2020 | 32 mm9 Oct 2014 | 86 mm2005 · driest 1 mm in 2003 | 31 |
| November | 26.7°C8 Nov 2006 | -25.0°C24 Nov 1993 | 25 mm25 Nov 2019 | 47 mm1992 · driest 1 mm in 2008 | 31 |
| December | 21.1°C4 Dec 2007 | -33.3°C22 Dec 1990 | 11 mm12 Dec 2015 | 27 mm2007 · driest 0 mm in 1996 | 31 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 31 | <1 | 4 |
| February | 0 | 0 | 27 | 0 | 5 |
| March | <1 | 0 | 25 | <1 | 4 |
| April | 3 | <1 | 13 | 2 | 3 |
| May | 10 | 2 | 2 | 2 | <1 |
| June | 22 | 10 | 0 | 2 | 0 |
| July | 29 | 20 | 0 | 1 | 0 |
| August | 27 | 16 | 0 | <1 | 0 |
| September | 18 | 7 | <1 | 1 | <1 |
| October | 5 | <1 | 11 | <1 | 1 |
| November | <1 | 0 | 26 | <1 | 4 |
| December | 0 | 0 | 30 | <1 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 8% | <1% | 3% | 2.3–8.4°C |
| February | 2% | 10% | <1% | 4% | 4.1–11.0°C |
| March | 16% | 14% | 3% | 9% | 9.9–15.8°C |
| April | 33% | 20% | 5% | 21% | 12.9–19.3°C |
| May | 52% | 26% | 7% | 30% | 18.0–23.6°C |
| June | 79% | 20% | 6% | 19% | 24.3–30.3°C |
| July | 82% | 18% | 4% | 17% | 29.0–32.7°C |
| August | 84% | 16% | 3% | 10% | 27.0–31.3°C |
| September | 74% | 16% | 4% | 16% | 22.4–27.4°C |
| October | 42% | 14% | 3% | 9% | 15.2–19.9°C |
| November | 10% | 11% | 2% | 6% | 6.9–13.5°C |
| December | <1% | 9% | <1% | 2% | 1.8–7.6°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