September
September · August · June
80climate match
United States · 1991–2020
Best time to visit
Ellsworth.
September leads for comfortable weather in Ellsworth: typically 24.2°C by day, 9.9°C at night, with 84 mm of rain. Based on measured 1991–2020 NOAA station history.
Best comfortSeptember
Typical high24.2°C
Typical low9.9°C
Rain in September84 mm
July
July · August · June
67climate match
September
September · October · May
74climate match
The weakest month is January, scoring 5 against September’s 80 — days reach only -2.7°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
5-2.7° / -13.2°
Feb
5-0.2° / -10.9°
Mar
57.2° / -4.2°
Apr
3415.4° / 1.7°
May
5921.6° / 8.6°
Jun
6726.8° / 14.5°
Jul
6728.6° / 16.4°
Aug
7127.4° / 14.9°
Sep
8024.2° / 9.9°
Oct
4717° / 3°
Nov
107.9° / -3.7°
Dec
50.3° / -9.8°
| Month | Day | Night | Rain | Wet days | Daylight | Comfort | Coverage |
|---|---|---|---|---|---|---|---|
| January | -2.7°C | -13.2°C | 25 mm | 5 | 9 h 24 | 5 | Strong coverage |
| February | -0.2°C | -10.9°C | 31 mm | 5.3 | 10 h 30 | 5 | Strong coverage |
| March | 7.2°C | -4.2°C | 49 mm | 6.2 | 11 h 48 | 5 | Strong coverage |
| April | 15.4°C | 1.7°C | 94 mm | 9 | 13 h 18 | 34 | Strong coverage |
| May | 21.6°C | 8.6°C | 134 mm | 12 | 14 h 34 | 59 | Strong coverage |
| June | 26.8°C | 14.5°C | 146 mm | 11.1 | 15 h 15 | 67 | Strong coverage |
| July | 28.6°C | 16.4°C | 112 mm | 8 | 14 h 59 | 67 | Strong coverage |
| August | 27.4°C | 14.9°C | 124 mm | 8.2 | 13 h 53 | 71 | Strong coverage |
| September | 24.2°C | 9.9°C | 84 mm | 7 | 12 h 26 | 80 | Strong coverage |
| October | 17°C | 3°C | 67 mm | 7.1 | 10 h 59 | 47 | Strong coverage |
| November | 7.9°C | -3.7°C | 43 mm | 5 | 9 h 43 | 10 | Strong coverage |
| December | 0.3°C | -9.8°C | 34 mm | 5.3 | 9 h 06 | 5 | Strong coverage |
What has changed
Ellsworth runs +0.1°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
+0.7
Feb
-0.6
Mar
+1.0
Apr
-1.2
May
-1.3
Jun
-0.1
Jul
-0.7
Aug
-0.5
Sep
+1.4
Oct
0.0
Nov
+0.7
Dec
+2.3
| Month | Record high | Record low | Wettest day | Wettest / driest month | Years |
|---|---|---|---|---|---|
| January | 22.2°C27 Jan 2002 | -36.1°C22 Jan 1930 | 31 mm4 Jan 1906 | 67 mm1949 · driest 0 mm in 1899 | 124 |
| February | 24.4°C27 Feb 2024 | -36.7°C15 Feb 1930 | 39 mm22 Feb 1922 | 120 mm2019 · driest 0 mm in 1987 | 126 |
| March | 31.7°C29 Mar 1986 | -33.9°C1 Mar 1962 | 46 mm30 Mar 1976 | 115 mm2004 · driest 0 mm in 1910 | 126 |
| April | 36.1°C22 Apr 1980 | -15.6°C6 Apr 1982 | 60 mm25 Apr 2007 | 216 mm1999 · driest 3 mm in 1910 | 124 |
| May | 41.7°C30 May 1934 | -8.3°C4 May 1907 | 79 mm19 May 1944 | 236 mm2004 · driest 19 mm in 1934 | 126 |
| June | 41.7°C27 Jun 1934 | 0.6°C3 Jun 1946 | 126 mm17 Jun 1932 | 332 mm1998 · driest 23 mm in 1927 | 127 |
| July | 42.8°C14 Jul 1936 | 3.9°C16 Jul 1911 | 159 mm7 Jul 1955 | 358 mm2010 · driest 0 mm in 1894 | 127 |
| August | 42.8°C18 Aug 1936 | 1.1°C29 Aug 1946 | 132 mm21 Aug 1998 | 379 mm1993 · driest 0 mm in 1947 | 126 |
| September | 39.4°C6 Sep 1939 | -6.7°C28 Sep 1942 | 116 mm30 Sep 1925 | 292 mm1965 · driest 5 mm in 1952 | 125 |
| October | 35.6°C5 Oct 1963 | -22.2°C29 Oct 1925 | 60 mm19 Oct 1982 | 190 mm2019 · driest 2 mm in 1952 | 125 |
| November | 27.2°C9 Nov 2006 | -26.7°C26 Nov 1977 | 76 mm23 Nov 1931 | 177 mm1909 · driest 0 mm in 2007 | 125 |
| December | 20.6°C16 Dec 2021 | -33.3°C26 Dec 1914 | 67 mm14 Dec 2015 | 148 mm2015 · driest 0 mm in 2002 | 126 |
| Month | Days 25°C+ | Days 30°C+ | Frost nights | Heavy rain (10 mm+) | Snow days |
|---|---|---|---|---|---|
| January | 0 | 0 | 30 | <1 | 4 |
| February | 0 | 0 | 27 | <1 | 5 |
| March | <1 | 0 | 24 | 2 | 2 |
| April | 3 | <1 | 12 | 3 | <1 |
| May | 10 | 2 | 2 | 4 | 0 |
| June | 21 | 8 | 0 | 5 | 0 |
| July | 28 | 11 | 0 | 3 | 0 |
| August | 25 | 7 | 0 | 4 | 0 |
| September | 15 | 4 | 1 | 3 | 0 |
| October | 4 | <1 | 10 | 2 | <1 |
| November | <1 | 0 | 23 | 1 | 2 |
| December | 0 | 0 | 29 | <1 | 4 |
| Month | Warm & dry days | Wet days | Washouts | Week with 3+ wet days | Daytime mean has ranged |
|---|---|---|---|---|---|
| January | 0% | 14% | 2% | 7% | -6.9–2.2°C |
| February | <1% | 15% | 2% | 10% | -4.0–4.3°C |
| March | 6% | 19% | 5% | 18% | 2.7–11.6°C |
| April | 24% | 26% | 9% | 30% | 12.1–18.9°C |
| May | 49% | 31% | 12% | 39% | 19.9–25.0°C |
| June | 66% | 31% | 13% | 37% | 25.1–29.7°C |
| July | 76% | 24% | 10% | 24% | 27.3–32.5°C |
| August | 75% | 25% | 10% | 26% | 26.4–31.4°C |
| September | 65% | 22% | 9% | 23% | 22.1–26.9°C |
| October | 35% | 19% | 7% | 18% | 14.6–20.8°C |
| November | 4% | 15% | 4% | 10% | 4.3–11.2°C |
| December | 0% | 14% | 3% | 9% | -3.9–4.0°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 4855423
- NOAA station
- USC00138806 · WEBSTER CITY
- Station distance
- 25 km from the place centre
- Climate period
- 1991–2020
- Minimum month coverage
- 29 usable years
- Daylight
- Calculated from latitude 42.31°, 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.