September
September · June · August
83climate match
United States · 1991–2020
Best time to visit
Andersonville.
September leads for comfortable weather in Andersonville: typically 25.2°C by day, 8.9°C at night, with 36 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high25.2°C
Typical low8.9°C
Rain in September36 mm
August
August · July · June
76climate match
September
September · October · May
79climate match
The weakest month is January, scoring 5 against September’s 83 — days reach only 7.2°C, 17° below the 24°C the score treats as ideal, and nights drop to -7.6°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
57.2° / -7.6°
Feb
108.2° / -6.3°
Mar
3413.5° / -1.9°
Apr
4816.9° / 1.9°
May
6721.6° / 6.8°
Jun
7727.6° / 11.6°
Jul
7430.8° / 14.8°
Aug
7729.4° / 13.6°
Sep
8325.2° / 8.9°
Oct
5617.9° / 2.3°
Nov
2511.4° / -3.3°
Dec
56.7° / -7.6°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | 7.2°C | -7.6°C | 10 mm | 2.4 | 9 h 34 | 5 | Strong coverage |
| February | 8.2°C | -6.3°C | 12 mm | 3.1 | 10 h 35 | 10 | Strong coverage |
| March | 13.5°C | -1.9°C | 33 mm | 4.3 | 11 h 49 | 34 | Strong coverage |
| April | 16.9°C | 1.9°C | 53 mm | 6.4 | 13 h 14 | 48 | Strong coverage |
| May | 21.6°C | 6.8°C | 70 mm | 8.5 | 14 h 25 | 67 | Strong coverage |
| June | 27.6°C | 11.6°C | 48 mm | 6 | 15 h 04 | 77 | Strong coverage |
| July | 30.8°C | 14.8°C | 41 mm | 5.8 | 14 h 48 | 74 | Strong coverage |
| August | 29.4°C | 13.6°C | 37 mm | 5.1 | 13 h 47 | 77 | Strong coverage |
| September | 25.2°C | 8.9°C | 36 mm | 4.9 | 12 h 25 | 83 | Strong coverage |
| October | 17.9°C | 2.3°C | 32 mm | 4.5 | 11 h 03 | 56 | Strong coverage |
| November | 11.4°C | -3.3°C | 19 mm | 3.2 | 9 h 52 | 25 | Strong coverage |
| December | 6.7°C | -7.6°C | 12 mm | 2.6 | 9 h 17 | 5 | Strong coverage |
What has changed
Andersonville runs +1.7°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
+2.0
Feb
+0.2
Mar
+3.0
Apr
+1.1
May
+0.2
Jun
+2.5
Jul
+1.6
Aug
+2.0
Sep
+3.1
Oct
+0.8
Nov
+2.1
Dec
+2.3
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 23.9°C26 Jan 2015 | -38.9°C17 Jan 1930 | 22 mm8 Jan 1962 | 37 mm2014 · driest 0 mm in 2020 | 133 |
| February | 25.0°C10 Feb 2017 | -40.6°C1 Feb 1951 | 41 mm3 Feb 2024 | 52 mm2024 · driest 0 mm in 2026 | 133 |
| March | 32.8°C21 Mar 2026 | -35.0°C6 Mar 1943 | 88 mm6 Mar 1990 | 146 mm2003 · driest 0 mm in 2012 | 133 |
| April | 31.7°C30 Apr 1992 | -23.3°C4 Apr 1945 | 61 mm30 Apr 1999 | 268 mm1900 · driest 1 mm in 1908 | 132 |
| May | 36.1°C29 May 2000 | -11.1°C6 May 1917 | 82 mm13 May 1961 | 190 mm1901 · driest 0 mm in 1974 | 130 |
| June | 38.9°C23 Jun 1954 | -1.7°C13 Jun 1947 | 90 mm4 Jun 1949 | 160 mm1949 · driest 1 mm in 1917 | 133 |
| July | 39.4°C21 Jul 2005 | 2.2°C4 Jul 1903 | 118 mm29 Jul 1997 | 171 mm1997 · driest 0 mm in 1939 | 132 |
| August | 37.8°C1 Aug 1902 | 0.0°C25 Aug 1910 | 78 mm3 Aug 1951 | 188 mm1951 · driest 1 mm in 2012 | 132 |
| September | 37.2°C6 Sep 2020 | -7.8°C30 Sep 1985 | 110 mm21 Sep 1902 | 186 mm1938 · driest 0 mm in 1932 | 132 |
| October | 31.1°C16 Oct 1991 | -22.2°C31 Oct 1905 | 56 mm16 Oct 1942 | 170 mm1942 · driest 0 mm in 1933 | 132 |
| November | 27.2°C8 Nov 2006 | -29.4°C13 Nov 1916 | 32 mm20 Nov 1979 | 58 mm1973 · driest 0 mm in 1899 | 132 |
| December | 24.4°C11 Dec 1939 | -37.2°C9 Dec 1919 | 45 mm1 Dec 1913 | 104 mm1913 · driest 0 mm in 1942 | 131 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 29 | <1 | 4 |
| February | 0 | 0 | 26 | <1 | 5 |
| March | <1 | 0 | 22 | <1 | 5 |
| April | 3 | <1 | 9 | 2 | 3 |
| May | 10 | 2 | 1 | 2 | <1 |
| June | 23 | 11 | 0 | 2 | 0 |
| July | 29 | 20 | 0 | 1 | 0 |
| August | 27 | 16 | 0 | 1 | 0 |
| September | 18 | 6 | <1 | 1 | <1 |
| October | 5 | <1 | 9 | 1 | 1 |
| November | <1 | 0 | 24 | <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% | 4% | 2.1–8.9°C |
| February | 2% | 11% | <1% | 7% | 2.8–10.6°C |
| March | 11% | 16% | 2% | 13% | 6.8–14.8°C |
| April | 31% | 21% | 5% | 21% | 13.2–19.1°C |
| May | 52% | 27% | 7% | 32% | 18.1–23.1°C |
| June | 78% | 19% | 5% | 18% | 24.0–29.4°C |
| July | 80% | 20% | 4% | 18% | 27.5–32.1°C |
| August | 82% | 17% | 3% | 13% | 27.1–30.6°C |
| September | 75% | 15% | 4% | 12% | 22.1–26.9°C |
| October | 44% | 13% | 3% | 9% | 15.4–20.4°C |
| November | 8% | 10% | 1% | 4% | 7.6–13.9°C |
| December | <1% | 9% | <1% | 4% | 2.5–9.0°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 5574287
- NOAA station
- USC00053005 · FT COLLINS
- Station distance
- 3.1 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 40.59°, 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.