September
September · August · June
79climate match
United States · 1991–2020
Best time to visit
Highland Park.
September leads for comfortable weather in Highland Park: typically 24.5°C by day, 9.8°C at night, with 85 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.5°C
Typical low9.8°C
Rain in September85 mm
July
July · August · June
73climate match
September
September · May · October
73climate match
The weakest month is January, scoring 5 against September’s 79 — days reach only -2.8°C, 27° 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
5-2.8° / -13.8°
Feb
50.1° / -11.5°
Mar
57.3° / -5.1°
Apr
3515.2° / 1.2°
May
6421.7° / 8.1°
Jun
7227° / 14.3°
Jul
6929.4° / 16.6°
Aug
7428.2° / 15.1°
Sep
7924.5° / 9.8°
Oct
4616.7° / 2.5°
Nov
87.2° / -4.9°
Dec
5-0.4° / -10.8°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -2.8°C | -13.8°C | 19 mm | 4 | 9 h 20 | 5 | Strong coverage |
| February | 0.1°C | -11.5°C | 20 mm | 3.7 | 10 h 27 | 5 | Strong coverage |
| March | 7.3°C | -5.1°C | 43 mm | 5.2 | 11 h 47 | 5 | Strong coverage |
| April | 15.2°C | 1.2°C | 81 mm | 7.9 | 13 h 20 | 35 | Strong coverage |
| May | 21.7°C | 8.1°C | 105 mm | 9.4 | 14 h 38 | 64 | Strong coverage |
| June | 27°C | 14.3°C | 113 mm | 9.4 | 15 h 21 | 72 | Strong coverage |
| July | 29.4°C | 16.6°C | 89 mm | 6.7 | 15 h 04 | 69 | Strong coverage |
| August | 28.2°C | 15.1°C | 91 mm | 7.4 | 13 h 56 | 74 | Strong coverage |
| September | 24.5°C | 9.8°C | 85 mm | 6.4 | 12 h 26 | 79 | Strong coverage |
| October | 16.7°C | 2.5°C | 67 mm | 6.1 | 10 h 57 | 46 | Strong coverage |
| November | 7.2°C | -4.9°C | 34 mm | 3.6 | 9 h 39 | 8 | Strong coverage |
| December | -0.4°C | -10.8°C | 32 mm | 4.2 | 9 h 01 | 5 | Strong coverage |
What has changed
Highland Park runs -0.3°C
on the 1961–1990 baseline.
Each bar compares the 2011–2025 daytime average for that month against the same month in 1961–1990, measured at the same station. Months where the older record is too thin to compare are left blank.
Jan
+0.2
Feb
-1.3
Mar
+0.5
Apr
-1.7
May
-1.2
Jun
-0.4
Jul
+0.1
Aug
-0.7
Sep
+1.4
Oct
-1.2
Nov
-0.2
Dec
+0.6
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 20.0°C27 Jan 2002 | -34.4°C14 Jan 1982 | 28 mm30 Jan 2001 | 46 mm2001 · driest 0 mm in 1984 | 83 |
| February | 22.2°C22 Feb 2017 | -36.1°C11 Feb 1988 | 33 mm28 Feb 1951 | 77 mm1962 · driest 0 mm in 1985 | 80 |
| March | 32.2°C30 Mar 1943 | -29.4°C11 Mar 1948 | 58 mm24 Mar 2017 | 118 mm1995 · driest 0 mm in 1994 | 83 |
| April | 33.9°C22 Apr 1960 | -18.3°C3 Apr 1975 | 66 mm4 Apr 2019 | 224 mm1984 · driest 8 mm in 1969 | 81 |
| May | 39.4°C25 May 1967 | -5.6°C3 May 1967 | 104 mm1 May 1972 | 249 mm2019 · driest 12 mm in 1940 | 83 |
| June | 41.7°C21 Jun 1988 | 1.7°C4 Jun 1945 | 192 mm7 Jun 1953 | 401 mm1983 · driest 15 mm in 2012 | 83 |
| July | 42.8°C29 Jul 1947 | 4.4°C30 Jul 1971 | 116 mm21 Jul 2010 | 238 mm1978 · driest 0 mm in 2007 | 83 |
| August | 41.7°C15 Aug 1937 | 1.1°C20 Aug 1950 | 121 mm29 Aug 1985 | 254 mm2006 · driest 16 mm in 1941 | 83 |
| September | 38.9°C13 Sep 1939 | -6.1°C28 Sep 1942 | 85 mm16 Sep 1987 | 254 mm1965 · driest 6 mm in 1998 | 83 |
| October | 35.6°C5 Oct 1963 | -13.9°C30 Oct 1993 | 75 mm16 Oct 1968 | 157 mm2008 · driest 0 mm in 1952 | 83 |
| November | 26.7°C10 Nov 1999 | -28.3°C7 Nov 1991 | 65 mm10 Nov 1998 | 114 mm1983 · driest 1 mm in 2017 | 82 |
| December | 18.9°C2 Dec 1998 | -33.9°C23 Dec 1989 | 58 mm17 Dec 2016 | 146 mm2003 · driest 0 mm in 1943 | 83 |
| 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 | <1 | 4 |
| March | <1 | 0 | 26 | 1 | 3 |
| April | 3 | <1 | 13 | 3 | 1 |
| May | 10 | 3 | 2 | 3 | 0 |
| June | 21 | 9 | 0 | 3 | 0 |
| July | 26 | 15 | 0 | 3 | 0 |
| August | 25 | 10 | 0 | 3 | 0 |
| September | 15 | 5 | 1 | 3 | 0 |
| October | 4 | <1 | 11 | 2 | <1 |
| November | <1 | 0 | 24 | 1 | 2 |
| December | 0 | 0 | 30 | 1 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 12% | <1% | 6% | -6.8–2.3°C |
| February | <1% | 13% | 2% | 9% | -3.9–5.0°C |
| March | 7% | 18% | 4% | 15% | 3.0–11.4°C |
| April | 27% | 24% | 8% | 28% | 12.5–19.0°C |
| May | 52% | 28% | 10% | 35% | 20.1–25.2°C |
| June | 68% | 29% | 11% | 34% | 25.3–29.6°C |
| July | 77% | 22% | 9% | 20% | 27.8–32.3°C |
| August | 76% | 24% | 9% | 23% | 26.8–31.1°C |
| September | 67% | 21% | 8% | 21% | 22.0–27.0°C |
| October | 36% | 16% | 5% | 13% | 14.8–20.6°C |
| November | 4% | 12% | 3% | 7% | 3.4–11.1°C |
| December | 0% | 12% | 2% | 7% | -3.9–3.5°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
Nearby, measured,
and named.
- Place identity
- GeoNames 4860598
- NOAA station
- USC00133718 · HAWARDEN
- Station distance
- 12.9 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 28 usable years
- Daylight
- Calculated from latitude 43.05°, 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.