September
September · May · October
United States · 1991–2020
September leads for comfortable weather in Highland: typically 27.7°C by day, 15.5°C at night, with 100 mm of rain. Based on measured 1991–2020 NOAA station history.
September · May · October
June · July · August
October · April · November
The weakest month is January, scoring 5 against September’s 76 — days reach only 7.8°C, 16° below the 24°C the score treats as ideal, and nights drop to -3°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 | 7.8°C | -3°C | 85 mm | 6.9 | 9 h 56 | 5 | Good coverage |
| February | 9.7°C | -1.5°C | 109 mm | 7.9 | 10 h 48 | 8 | Good coverage |
| March | 15.6°C | 3.7°C | 130 mm | 9.4 | 11 h 51 | 33 | Good coverage |
| April | 21.2°C | 8.9°C | 136 mm | 8.1 | 13 h 04 | 61 | Good coverage |
| May | 24.9°C | 13.7°C | 154 mm | 10 | 14 h 04 | 72 | Good coverage |
| June | 29.9°C | 18.5°C | 90 mm | 7 | 14 h 37 | 63 | Good coverage |
| July | 31.9°C | 20.6°C | 99 mm | 7.6 | 14 h 24 | 51 | Good coverage |
| August | 31.7°C | 19.9°C | 108 mm | 8.1 | 13 h 32 | 51 | Good coverage |
| September | 27.7°C | 15.5°C | 100 mm | 5.1 | 12 h 22 | 76 | Good coverage |
| October | 21.5°C | 9°C | 102 mm | 7.6 | 11 h 12 | 67 | Good coverage |
| November | 15.3°C | 3.3°C | 103 mm | 7.1 | 10 h 11 | 37 | Good coverage |
| December | 9°C | -1.4°C | 112 mm | 7.6 | 9 h 42 | 6 | Good coverage |
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 26.1°C21 Jan 1906 | -26.1°C12 Jan 1918 | 102 mm13 Jan 2013 | 275 mm1913 · driest 12 mm in 1921 | 51 |
| February | 31.1°C28 Feb 2024 | -28.3°C12 Feb 1899 | 90 mm10 Feb 2009 | 287 mm2018 · driest 16 mm in 2026 | 50 |
| March | 32.8°C10 Mar 1911 | -15.0°C3 Mar 2014 | 122 mm19 Mar 2008 | 286 mm2008 · driest 14 mm in 1918 | 51 |
| April | 32.8°C23 Apr 1919 | -5.0°C8 Apr 2007 | 113 mm26 Apr 2011 | 344 mm2011 · driest 24 mm in 2001 | 51 |
| May | 37.2°C29 May 1921 | -1.1°C1 May 1903 | 91 mm12 May 1918 | 309 mm2019 · driest 6 mm in 2005 | 50 |
| June | 42.2°C26 Jun 1914 | 7.2°C13 Jun 1903 | 80 mm29 Jun 1921 | 205 mm1904 · driest 4 mm in 2026 | 52 |
| July | 42.8°C23 Jul 1901 | 10.0°C5 Jul 1915 | 108 mm8 Jul 1909 | 262 mm1910 · driest 9 mm in 2026 | 52 |
| August | 44.4°C4 Aug 1918 | 6.7°C31 Aug 1915 | 170 mm19 Aug 1915 | 497 mm1915 · driest 14 mm in 1909 | 52 |
| September | 41.1°C4 Sep 1913 | 0.6°C30 Sep 1916 | 187 mm23 Sep 2006 | 304 mm2006 · driest 0 mm in 2004 | 52 |
| October | 37.2°C4 Oct 1921 | -6.1°C30 Oct 1917 | 94 mm29 Oct 2009 | 317 mm2009 · driest 5 mm in 2024 | 53 |
| November | 30.0°C1 Nov 1915 | -11.7°C13 Nov 2019 | 112 mm18 Nov 1899 | 291 mm2011 · driest 1 mm in 1904 | 52 |
| December | 25.6°C3 Dec 2021 | -21.7°C15 Dec 1914 | 93 mm28 Dec 2015 | 228 mm2009 · driest 15 mm in 2005 | 51 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 21 | 3 | <1 |
| February | <1 | 0 | 16 | 3 | <1 |
| March | 3 | 0 | 7 | 4 | <1 |
| April | 8 | <1 | 1 | 4 | 0 |
| May | 18 | 4 | 0 | 5 | 0 |
| June | 28 | 17 | 0 | 3 | 0 |
| July | 30 | 23 | 0 | 3 | 0 |
| August | 30 | 22 | 0 | 3 | 0 |
| September | 23 | 10 | 0 | 3 | 0 |
| October | 10 | 2 | 1 | 3 | 0 |
| November | 1 | 0 | 8 | 3 | <1 |
| December | 0 | 0 | 18 | 4 | <1 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 3% | 24% | 10% | 24% | 5.1–11.3°C |
| February | 8% | 26% | 11% | 29% | 6.1–13.7°C |
| March | 26% | 28% | 12% | 32% | 12.8–20.2°C |
| April | 46% | 29% | 13% | 34% | 19.3–23.8°C |
| May | 62% | 31% | 15% | 39% | 23.1–27.9°C |
| June | 74% | 27% | 12% | 30% | 28.1–32.7°C |
| July | 75% | 25% | 11% | 26% | 30.0–35.2°C |
| August | 76% | 25% | 10% | 28% | 29.2–34.8°C |
| September | 78% | 20% | 10% | 20% | 25.9–30.5°C |
| October | 58% | 21% | 9% | 21% | 19.7–24.7°C |
| November | 26% | 21% | 9% | 19% | 13.0–18.5°C |
| December | 3% | 24% | 11% | 26% | 5.8–12.5°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