September
September · May · June
77climate match
United States · 1991–2020
Best time to visit
Fairbury.
September leads for comfortable weather in Fairbury: typically 26.7°C by day, 12°C at night, with 77 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high26.7°C
Typical low12°C
Rain in September77 mm
August
August · July · June
71climate match
October
October · April · May
83climate match
The weakest month is January, scoring 5 against September’s 77 — days reach only 2.6°C, 21° below the 24°C the score treats as ideal, and nights drop to -9.7°C.
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
52.6° / -9.7°
Feb
55.3° / -7.8°
Mar
2612° / -2.3°
Apr
4917.9° / 3.3°
May
6923.4° / 9.8°
Jun
6529° / 15.8°
Jul
5431.6° / 18.4°
Aug
6330.6° / 17.2°
Sep
7726.7° / 12°
Oct
6119.6° / 4.7°
Nov
2611.3° / -2.3°
Dec
54.5° / -7.5°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 2.6°C | -9.7°C | 20 mm | 3.7 | 9 h 36 | 5 | Strong coverage |
| February | 5.3°C | -7.8°C | 26 mm | 3.9 | 10 h 37 | 5 | Strong coverage |
| March | 12°C | -2.3°C | 43 mm | 5.3 | 11 h 49 | 26 | Strong coverage |
| April | 17.9°C | 3.3°C | 75 mm | 8.1 | 13 h 13 | 49 | Strong coverage |
| May | 23.4°C | 9.8°C | 129 mm | 9.8 | 14 h 22 | 69 | Strong coverage |
| June | 29°C | 15.8°C | 127 mm | 8.1 | 15 h 01 | 65 | Strong coverage |
| July | 31.6°C | 18.4°C | 110 mm | 7.8 | 14 h 46 | 54 | Strong coverage |
| August | 30.6°C | 17.2°C | 88 mm | 7.2 | 13 h 45 | 63 | Strong coverage |
| September | 26.7°C | 12°C | 77 mm | 5.9 | 12 h 24 | 77 | Strong coverage |
| October | 19.6°C | 4.7°C | 60 mm | 5.5 | 11 h 04 | 61 | Strong coverage |
| November | 11.3°C | -2.3°C | 34 mm | 4.1 | 9 h 54 | 26 | Strong coverage |
| December | 4.5°C | -7.5°C | 28 mm | 3.6 | 9 h 20 | 5 | Strong coverage |
What has changed
Fairbury runs +0.9°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
+1.2
Feb
+0.2
Mar
+2.3
Apr
+0.2
May
+0.2
Jun
+1.3
Jul
-0.7
Aug
-0.3
Sep
+2.2
Oct
+0.5
Nov
+1.7
Dec
+2.4
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 25.6°C11 Jan 1990 | -31.7°C12 Jan 1912 | 29 mm7 Jan 1937 | 63 mm1949 · driest 0 mm in 1900 | 131 |
| February | 26.7°C27 Feb 2024 | -41.1°C16 Feb 2021 | 47 mm12 Feb 1919 | 80 mm1948 · driest 0 mm in 1977 | 131 |
| March | 35.0°C22 Mar 2026 | -27.8°C5 Mar 1978 | 61 mm14 Mar 2021 | 190 mm1987 · driest 0 mm in 1910 | 131 |
| April | 39.4°C20 Apr 1902 | -12.8°C4 Apr 1975 | 88 mm27 Apr 1906 | 172 mm2008 · driest 4 mm in 1934 | 131 |
| May | 39.4°C30 May 1934 | -3.9°C1 May 1909 | 114 mm26 May 1918 | 337 mm1903 · driest 5 mm in 2012 | 131 |
| June | 43.9°C25 Jun 1911 | 1.1°C5 Jun 1903 | 143 mm9 Jun 1941 | 425 mm1908 · driest 14 mm in 2016 | 131 |
| July | 45.6°C17 Jul 1936 | 5.6°C31 Jul 1898 | 194 mm9 Jul 1950 | 371 mm1993 · driest 2 mm in 1936 | 130 |
| August | 45.6°C13 Aug 1936 | 3.9°C30 Aug 1915 | 159 mm5 Aug 1927 | 334 mm1927 · driest 17 mm in 1941 | 130 |
| September | 44.4°C3 Sep 1947 | -5.0°C28 Sep 1899 | 132 mm15 Sep 1941 | 316 mm1941 · driest 6 mm in 1974 | 131 |
| October | 37.8°C5 Oct 1947 | -13.3°C31 Oct 2019 | 82 mm11 Oct 1973 | 137 mm2002 · driest 0 mm in 1952 | 130 |
| November | 30.0°C9 Nov 2006 | -22.8°C28 Nov 1976 | 83 mm12 Nov 1909 | 171 mm1909 · driest 0 mm in 1949 | 130 |
| December | 26.7°C24 Dec 1964 | -32.2°C23 Dec 1989 | 46 mm16 Dec 1984 | 107 mm1913 · driest 0 mm in 1903 | 130 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 3 |
| February | <1 | 0 | 25 | <1 | 3 |
| March | 2 | <1 | 21 | 1 | 1 |
| April | 5 | 1 | 9 | 3 | <1 |
| May | 14 | 5 | 1 | 4 | 0 |
| June | 25 | 14 | 0 | 4 | 0 |
| July | 29 | 21 | 0 | 3 | 0 |
| August | 28 | 18 | 0 | 3 | 0 |
| September | 19 | 9 | <1 | 2 | 0 |
| October | 8 | 1 | 7 | 2 | <1 |
| November | <1 | 0 | 21 | 1 | 1 |
| December | 0 | 0 | 29 | <1 | 2 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | <1% | 11% | 1% | 6% | -2.4–6.5°C |
| February | 3% | 14% | 3% | 10% | 0.3–9.8°C |
| March | 16% | 18% | 4% | 14% | 6.7–15.8°C |
| April | 36% | 25% | 8% | 29% | 15.3–21.4°C |
| May | 55% | 31% | 11% | 40% | 21.1–26.5°C |
| June | 70% | 28% | 12% | 31% | 26.5–32.2°C |
| July | 76% | 24% | 10% | 25% | 29.6–35.8°C |
| August | 75% | 24% | 10% | 24% | 28.6–34.6°C |
| September | 72% | 21% | 9% | 20% | 23.9–30.1°C |
| October | 50% | 17% | 5% | 14% | 17.3–23.6°C |
| November | 12% | 13% | 4% | 9% | 7.9–14.4°C |
| December | <1% | 11% | 2% | 6% | 0.3–7.7°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
Nearby, measured,
and named.
- Place identity
- GeoNames 5067896
- NOAA station
- USC00252820 · FAIRBURY 7S
- Station distance
- 10 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 40.14°, 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.