United States · 1991–2020

Best time to visit
Waterman.

September leads for comfortable weather in Waterman: typically 23.9°C by day, 10.4°C at night, with 79 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high23.9°C

Typical low10.4°C

Rain in September79 mm

Comfort

September

September · August · June

82climate match

Beach

July

July · August · June

65climate match

Outdoors

September

September · May · October

75climate match

The weakest month is January, scoring 5 against September’s 82 — days reach only -1.9°C, 26° 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

5-1.9° / -10.3°

Feb

5-0.4° / -9.3°

Mar

57.7° / -2.3°

Apr

3515.2° / 2.5°

May

6321.5° / 9.2°

Jun

7526.5° / 14.7°

Jul

7427.6° / 15.9°

Aug

7826.6° / 14.4°

Sep

8223.9° / 10.4°

Oct

4516.5° / 4.1°

Nov

128.4° / -1.6°

Dec

50.8° / -7.2°

Monthly climate evidence for Waterman — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-1.9°C	-10.3°C	43 mm	7.1	9 h 27	5	Good coverage
February	-0.4°C	-9.3°C	52 mm	6.8	10 h 31	5	Good coverage
March	7.7°C	-2.3°C	66 mm	9	11 h 48	5	Good coverage
April	15.2°C	2.5°C	93 mm	9.5	13 h 17	35	Good coverage
May	21.5°C	9.2°C	120 mm	10.7	14 h 31	63	Good coverage
June	26.5°C	14.7°C	111 mm	9.3	15 h 12	75	Good coverage
July	27.6°C	15.9°C	96 mm	7.8	14 h 56	74	Good coverage
August	26.6°C	14.4°C	96 mm	7.1	13 h 51	78	Good coverage
September	23.9°C	10.4°C	79 mm	6.5	12 h 26	82	Good coverage
October	16.5°C	4.1°C	77 mm	7.8	11 h 00	45	Good coverage
November	8.4°C	-1.6°C	57 mm	6.4	9 h 46	12	Good coverage
December	0.8°C	-7.2°C	61 mm	7.7	9 h 09	5	Good coverage

Records at SHABBONA 5 NNE, 2003–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	16.6°C29 Jan 2013	-34.2°C31 Jan 2019	34 mm31 Jan 2025	88 mm2013 · driest 16 mm in 2026	23
February	25.3°C27 Feb 2024	-29.2°C11 Feb 2014	70 mm20 Feb 2014	110 mm2014 · driest 3 mm in 2026	23
March	28.0°C21 Mar 2012	-21.9°C3 Mar 2014	43 mm30 Mar 2017	141 mm2009 · driest 20 mm in 2015	23
April	29.2°C27 Apr 2021	-9.6°C8 Apr 2018	68 mm17 Apr 2013	202 mm2013 · driest 27 mm in 2018	23
May	35.3°C27 May 2012	-5.1°C3 May 2005	82 mm14 May 2020	207 mm2019 · driest 27 mm in 2026	23
June	35.8°C28 Jun 2012	5.1°C1 Jun 2025	69 mm22 Jun 2024	209 mm2014 · driest 20 mm in 2023	23
July	37.1°C7 Jul 2012	7.1°C4 Jul 2008	79 mm18 Jul 2007	210 mm2007 · driest 40 mm in 2013	23
August	34.3°C24 Aug 2023	0.0°C30 Aug 2022	139 mm23 Aug 2007	364 mm2007 · driest 6 mm in 2003	23
September	34.1°C20 Sep 2018	-1.3°C24 Sep 2012	167 mm13 Sep 2008	293 mm2019 · driest 2 mm in 2017	23
October	32.2°C3 Oct 2025	-7.2°C21 Oct 2018	114 mm14 Oct 2017	219 mm2017 · driest 17 mm in 2005	23
November	24.3°C9 Nov 2020	-17.6°C21 Nov 2014	60 mm17 Nov 2015	131 mm2015 · driest 11 mm in 2021	23
December	20.6°C3 Dec 2012	-25.5°C18 Dec 2016	45 mm10 Dec 2003	130 mm2015 · driest 19 mm in 2017	23

Typical days per month at SHABBONA 5 NNE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)
January	0	0	29	1
February	0	0	27	2
March	<1	0	22	2
April	2	0	10	3
May	9	2	<1	4
June	20	6	0	4
July	25	7	0	3
August	21	4	0	3
September	13	3	<1	2
October	3	<1	8	2
November	0	0	19	2
December	0	0	27	2

How often, not how much — every day in SHABBONA 5 NNE’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%	22%	4%	22%	-4.8–0.9°C
February	<1%	21%	5%	19%	-6.2–5.4°C
March	4%	29%	7%	40%	4.9–11.8°C
April	18%	33%	11%	41%	13.2–17.9°C
May	45%	32%	11%	37%	19.7–24.3°C
June	69%	29%	13%	36%	25.3–28.4°C
July	74%	26%	10%	28%	26.0–29.5°C
August	76%	23%	9%	23%	25.2–28.1°C
September	67%	20%	7%	19%	22.3–26.3°C
October	25%	25%	8%	24%	14.6–19.5°C
November	5%	21%	6%	21%	4.9–11.0°C
December	0%	24%	6%	25%	-2.5–5.1°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.

2004Each stripe is one year’s mean temperature against the 22-year average. Warmest: 2012. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4915683
NOAA station: USW00054811 · SHABBONA 5 NNE
Station distance: 10.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 17 usable years
Daylight: Calculated from latitude 41.77°, 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 SHABBONA 5 NNE is what differs

Shabbona→Lee→Afton Center→Elva→McGirr→Shabbona Grove→

Or put two places side by side: Waterman vs Shabbona

Best time to visitWaterman.

September

July

September

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Waterman.

The whole year,
without the guesswork.

Nearby, measured,
and named.