United States · 1991–2020

Best time to visit
Buffalo Prairie.

September leads for comfortable weather in Buffalo Prairie: typically 25.4°C by day, 13.1°C at night, with 91 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.4°C

Typical low13.1°C

Rain in September91 mm

Comfort

September

September · May · August

81climate match

Beach

July

July · August · June

75climate match

Outdoors

October

October · May · April

76climate match

The weakest month is January, scoring 5 against September’s 81 — days reach only -0.2°C, 24° 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

5-0.2° / -10°

Feb

51.4° / -9°

Mar

169.4° / -1.4°

Apr

4316.7° / 4.1°

May

7022.8° / 10.8°

Jun

6528° / 16.7°

Jul

6329.6° / 18.3°

Aug

6828.6° / 17.2°

Sep

8125.4° / 13.1°

Oct

5517.7° / 5.9°

Nov

2110.1° / -0.7°

Dec

52.5° / -6.7°

Monthly climate evidence for Buffalo Prairie — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-0.2°C	-10°C	29 mm	5.2	9 h 30	5	Good coverage
February	1.4°C	-9°C	39 mm	5.5	10 h 33	5	Good coverage
March	9.4°C	-1.4°C	58 mm	6.9	11 h 48	16	Good coverage
April	16.7°C	4.1°C	88 mm	8.9	13 h 15	43	Good coverage
May	22.8°C	10.8°C	124 mm	9.9	14 h 29	70	Good coverage
June	28°C	16.7°C	127 mm	9.9	15 h 09	65	Good coverage
July	29.6°C	18.3°C	99 mm	7.2	14 h 53	63	Good coverage
August	28.6°C	17.2°C	100 mm	7.2	13 h 50	68	Good coverage
September	25.4°C	13.1°C	91 mm	6.6	12 h 25	81	Good coverage
October	17.7°C	5.9°C	71 mm	6.6	11 h 01	55	Good coverage
November	10.1°C	-0.7°C	53 mm	5.9	9 h 48	21	Good coverage
December	2.5°C	-6.7°C	42 mm	5.6	9 h 12	5	Good coverage

Records at ILLINOIS CITY DAM 16, 1943–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	17.8°C27 Jan 1944	-32.2°C31 Jan 2019	36 mm29 Jan 2006	63 mm2006 · driest 11 mm in 2016	28
February	23.9°C27 Feb 2024	-32.2°C1 Feb 2019	30 mm28 Feb 1948	92 mm2019 · driest 3 mm in 2026	28
March	30.6°C17 Mar 1945	-24.4°C1 Mar 2015	53 mm11 Mar 1945	131 mm2009 · driest 12 mm in 2014	28
April	31.7°C30 Apr 2007	-8.9°C8 Apr 2018	71 mm18 Apr 2013	176 mm1947 · driest 20 mm in 2018	28
May	36.1°C28 May 2018	-5.0°C3 May 2011	74 mm5 May 2015	251 mm2019 · driest 23 mm in 2023	28
June	36.7°C29 Jun 2012	4.4°C4 Jun 1945	76 mm22 Jun 2007	253 mm2010 · driest 49 mm in 2004	28
July	38.3°C24 Jul 2012	8.3°C8 Jul 2026	107 mm1 Jul 2014	252 mm2025 · driest 11 mm in 1945	27
August	38.9°C3 Aug 1947	5.0°C26 Aug 2025	89 mm11 Aug 2025	198 mm2007 · driest 1 mm in 2013	28
September	37.2°C10 Sep 2013	1.1°C25 Sep 2012	103 mm21 Sep 1947	208 mm2019 · driest 4 mm in 1979	28
October	35.0°C3 Oct 2006	-4.4°C26 Oct 2013	77 mm18 Oct 2007	160 mm2009 · driest 21 mm in 2005	27
November	26.1°C1 Nov 1944	-15.0°C30 Nov 1947	56 mm27 Nov 2015	154 mm2015 · driest 14 mm in 2023	27
December	22.8°C16 Dec 2021	-24.4°C19 Dec 2016	38 mm30 Dec 2020	108 mm2015 · driest 11 mm in 2019	27

Typical days per month at ILLINOIS CITY DAM 16, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	<1	4
February	0	0	23	1	4
March	<1	0	17	2	2
April	3	<1	5	3	<1
May	12	3	<1	4	0
June	24	10	0	5	0
July	27	16	0	3	0
August	27	11	0	3	0
September	17	6	0	3	0
October	5	<1	3	2	<1
November	<1	0	15	2	<1
December	0	0	23	2	4

How often, not how much — every day in ILLINOIS CITY DAM 16’s record sorted by what it was actually like, rather than averaged
Month	Warm & dry days	Wet days	Washouts	Week with 3+ wet days	Daytime mean has ranged
January	0%	18%	3%	12%	-3.1–3.6°C
February	<1%	18%	3%	15%	-3.3–6.7°C
March	8%	25%	7%	27%	5.8–14.7°C
April	26%	30%	10%	35%	13.8–19.4°C
May	50%	31%	12%	37%	20.3–25.2°C
June	64%	30%	12%	37%	26.5–29.4°C
July	76%	25%	10%	26%	27.5–31.6°C
August	75%	24%	10%	25%	26.5–30.0°C
September	73%	22%	9%	23%	23.3–27.1°C
October	35%	20%	7%	21%	15.7–21.4°C
November	6%	20%	6%	16%	6.2–12.4°C
December	<1%	20%	5%	18%	-1.0–6.6°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.

1944Each stripe is one year’s mean temperature against the 24-year average. Warmest: 2012. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4885938
NOAA station: USC00114355 · ILLINOIS CITY DAM 16
Station distance: 16.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 16 usable years
Daylight: Calculated from latitude 41.34°, 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.

These places read the same station, so their numbers are identical — distance from ILLINOIS CITY DAM 16 is what differs

Muscatine→Fairport→Midway Beach→Montpelier→New Era→Pine Mills (historical)→

Or put two places side by side: Buffalo Prairie vs Muscatine

Best time to visitBuffalo Prairie.