United States · 1991–2020

Best time to visit
Rockford.

August leads for comfortable weather in Rockford: typically 26.3°C by day, 14.8°C at night, with 97 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high26.3°C

Typical low14.8°C

Rain in August97 mm

Comfort

August

August · June · September

81climate match

Beach

July

July · August · June

70climate match

Outdoors

September

September · May · October

84climate match

The weakest month is January, scoring 5 against August’s 81 — days reach only -5.2°C, 29° 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

5-5.2° / -16.2°

Feb

5-2.6° / -14.2°

Mar

54.2° / -6.5°

Apr

3012.8° / 0.6°

May

6320.1° / 7.8°

Jun

7825.4° / 13.8°

Jul

7527.7° / 16.1°

Aug

8126.3° / 14.8°

Sep

7722.2° / 9.7°

Oct

4014.6° / 2.6°

Nov

55.5° / -4.6°

Dec

5-1.9° / -11.5°

Monthly climate evidence for Rockford — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-5.2°C	-16.2°C	13 mm	2.6	9 h 07	5	Strong coverage
February	-2.6°C	-14.2°C	18 mm	2.3	10 h 20	5	Strong coverage
March	4.2°C	-6.5°C	22 mm	3.2	11 h 46	5	Strong coverage
April	12.8°C	0.6°C	66 mm	5.6	13 h 26	30	Strong coverage
May	20.1°C	7.8°C	85 mm	7.1	14 h 50	63	Strong coverage
June	25.4°C	13.8°C	115 mm	7.6	15 h 36	78	Strong coverage
July	27.7°C	16.1°C	89 mm	6	15 h 18	75	Strong coverage
August	26.3°C	14.8°C	97 mm	6	14 h 05	81	Strong coverage
September	22.2°C	9.7°C	73 mm	5.1	12 h 28	77	Strong coverage
October	14.6°C	2.6°C	67 mm	5.3	10 h 52	40	Strong coverage
November	5.5°C	-4.6°C	24 mm	2.8	9 h 28	5	Strong coverage
December	-1.9°C	-11.5°C	20 mm	2.7	8 h 46	5	Strong coverage

Records at DELANO, 1977–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	12.8°C24 Jan 1981	-36.7°C31 Jan 2019	43 mm18 Jan 1996	52 mm1996 · driest 0 mm in 2010	44
February	16.7°C18 Feb 2017	-38.3°C2 Feb 1996	28 mm12 Feb 2008	48 mm2023 · driest 0 mm in 2022	44
March	26.1°C26 Mar 2007	-28.9°C3 Mar 2019	39 mm3 Mar 1989	127 mm1989 · driest 0 mm in 2006	44
April	33.9°C21 Apr 1980	-16.1°C4 Apr 2018	105 mm23 Apr 2001	222 mm2001 · driest 0 mm in 2020	44
May	35.6°C15 May 2013	-3.9°C5 May 1989	91 mm23 May 2011	175 mm1991 · driest 0 mm in 2021	44
June	38.3°C24 Jun 1988	2.2°C1 Jun 1979	142 mm25 Jun 2002	397 mm2002 · driest 0 mm in 2021	43
July	40.0°C31 Jul 1988	5.0°C7 Jul 2005	79 mm22 Jul 1997	289 mm1997 · driest 0 mm in 2021	45
August	37.8°C1 Aug 2006	2.8°C23 Aug 2004	106 mm4 Aug 2002	244 mm2002 · driest 0 mm in 2020	43
September	36.1°C5 Sep 2023	-1.7°C23 Sep 2012	69 mm12 Sep 1978	145 mm2004 · driest 0 mm in 2022	44
October	32.2°C2 Oct 2023	-10.6°C28 Oct 2020	69 mm3 Oct 2017	174 mm2009 · driest 0 mm in 1989	43
November	25.0°C9 Nov 1999	-23.9°C6 Nov 1991	35 mm26 Nov 2001	84 mm2015 · driest 0 mm in 2020	43
December	17.8°C2 Dec 1998	-32.8°C22 Dec 1990	51 mm6 Dec 2010	93 mm2010 · driest 0 mm in 2001	45

Typical days per month at DELANO, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	24	<1	2
February	0	0	22	<1	2
March	<1	0	21	<1	2
April	<1	<1	11	2	<1
May	6	1	1	2	0
June	14	4	0	3	0
July	21	7	0	2	0
August	17	4	0	2	0
September	8	1	<1	2	0
October	2	<1	8	2	0
November	0	0	19	<1	<1
December	0	0	23	<1	2

How often, not how much — every day in DELANO’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%	9%	<1%	4%	-8.8–-1.2°C
February	0%	9%	1%	2%	-7.4–1.1°C
March	2%	12%	3%	9%	1.0–9.0°C
April	16%	19%	7%	17%	10.0–16.1°C
May	44%	23%	8%	23%	17.9–23.7°C
June	67%	27%	12%	27%	23.8–27.8°C
July	77%	20%	9%	14%	26.2–30.1°C
August	76%	20%	10%	18%	24.7–27.9°C
September	59%	17%	7%	11%	19.9–24.4°C
October	19%	15%	6%	7%	11.4–17.2°C
November	3%	10%	3%	5%	1.0–8.9°C
December	0%	10%	1%	2%	-5.9–1.4°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.

1978Each stripe is one year’s mean temperature against the 32-year average. Warmest: 1987. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5043556
NOAA station: USC00212088 · DELANO
Station distance: 5.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 28 usable years
Daylight: Calculated from latitude 45.09°, 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 DELANO is what differs

Minnetrista→Medina→Delano→Watertown→Independence→Montrose→

Or put two places side by side: Rockford vs Minnetrista

Best time to visitRockford.