United States · 1991–2020

Best time to visit
Grantville.

September leads for comfortable weather in Grantville: typically 27.2°C by day, 14°C at night, with 89 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high27.2°C

Typical low14°C

Rain in September89 mm

Comfort

September

September · May · October

77climate match

Beach

July

July · June · August

73climate match

Outdoors

October

October · April · November

83climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 4.7°C, 19° below the 24°C the score treats as ideal, and nights drop to -6.8°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

54.7° / -6.8°

Feb

107.6° / -4.5°

Mar

3613.9° / 1°

Apr

5619.5° / 6.5°

May

7424.7° / 12.6°

Jun

5729.9° / 18.3°

Jul

4932.3° / 20.6°

Aug

5231.7° / 19.2°

Sep

7727.2° / 14°

Oct

6620.5° / 7.2°

Nov

3512.9° / 0.5°

Dec

66.5° / -4.5°

Monthly climate evidence for Grantville — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	4.7°C	-6.8°C	22 mm	3.7	9 h 42	5	Strong coverage
February	7.6°C	-4.5°C	33 mm	4.1	10 h 40	10	Strong coverage
March	13.9°C	1°C	57 mm	6.3	11 h 50	36	Strong coverage
April	19.5°C	6.5°C	97 mm	8.3	13 h 10	56	Strong coverage
May	24.7°C	12.6°C	131 mm	9.7	14 h 17	74	Strong coverage
June	29.9°C	18.3°C	125 mm	8.6	14 h 54	57	Strong coverage
July	32.3°C	20.6°C	101 mm	7.1	14 h 39	49	Strong coverage
August	31.7°C	19.2°C	116 mm	7.4	13 h 42	52	Strong coverage
September	27.2°C	14°C	89 mm	6.2	12 h 24	77	Strong coverage
October	20.5°C	7.2°C	72 mm	6.3	11 h 06	66	Strong coverage
November	12.9°C	0.5°C	45 mm	4.3	9 h 59	35	Strong coverage
December	6.5°C	-4.5°C	38 mm	4	9 h 26	6	Strong coverage

What has changed

Grantville 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

+2.5

Feb

+1.8

Mar

+2.4

Apr

+0.8

May

+0.7

Jun

+2.3

Jul

+1.1

Aug

+0.8

Sep

+2.0

Oct

+0.9

Nov

+1.7

Dec

+3.6

September daytime highs, 2011–2025. Last recorded: 27.6°C.

Records at TOPEKA ASOS, 1946–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	25.6°C28 Jan 2015	-28.9°C12 Jan 1974	32 mm30 Jan 2002	133 mm1949 · driest 0 mm in 1986	80
February	28.9°C29 Feb 1972	-30.6°C1 Feb 1979	50 mm21 Feb 1971	89 mm1971 · driest 1 mm in 1991	80
March	35.6°C26 Mar 2026	-21.7°C4 Mar 1978	63 mm18 Mar 1992	214 mm1973 · driest 3 mm in 1966	80
April	36.1°C25 Apr 2012	-12.2°C3 Apr 1975	82 mm26 Apr 1969	221 mm1999 · driest 16 mm in 1989	80
May	36.7°C6 May 2023	-3.3°C1 May 1963	130 mm6 May 2007	300 mm1995 · driest 10 mm in 1966	80
June	41.7°C13 Jun 1953	5.6°C1 Jun 1964	105 mm21 Jun 1984	386 mm1967 · driest 14 mm in 1980	80
July	43.3°C30 Jul 1980	6.1°C5 Jul 1972	94 mm12 Jul 1951	306 mm1950 · driest 13 mm in 2018	80
August	44.4°C2 Aug 2011	5.0°C29 Aug 1988	114 mm18 Aug 1949	306 mm2019 · driest 7 mm in 1971	80
September	43.3°C3 Sep 1947	-1.7°C30 Sep 1984	143 mm23 Sep 2005	323 mm1973 · driest 15 mm in 2012	80
October	35.6°C5 Oct 1963	-7.2°C17 Oct 1976	88 mm15 Oct 1980	184 mm1980 · driest 1 mm in 1952	80
November	29.4°C8 Nov 1980	-16.7°C28 Nov 1976	118 mm15 Nov 1964	159 mm1964 · driest 0 mm in 1954	80
December	24.4°C15 Dec 2021	-32.2°C23 Dec 1989	65 mm7 Dec 1980	109 mm1973 · driest 1 mm in 1996	80

Typical days per month at TOPEKA ASOS, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	<1	0	28	<1	4
February	<1	0	23	1	3
March	2	<1	14	2	1
April	7	1	4	3	<1
May	16	6	<1	4	0
June	27	17	0	4	0
July	30	23	0	3	0
August	30	21	0	3	0
September	21	10	0	3	0
October	8	2	3	2	<1
November	<1	0	15	2	1
December	0	0	26	1	3

The best month has moved. On the 1961–1990 numbers the strongest month here was May (scoring 82); on 2011–2025 it is September (80). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in TOPEKA ASOS’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	1%	13%	3%	6%	-0.1–7.8°C
February	5%	14%	4%	9%	2.3–11.9°C
March	19%	21%	6%	22%	8.9–16.4°C
April	40%	26%	9%	28%	16.4–22.6°C
May	59%	31%	12%	39%	22.2–26.9°C
June	70%	29%	14%	36%	27.5–31.9°C
July	77%	23%	10%	22%	29.7–34.1°C
August	78%	22%	10%	23%	28.8–33.7°C
September	75%	20%	9%	18%	24.4–30.2°C
October	51%	19%	8%	18%	18.3–23.6°C
November	15%	15%	5%	10%	9.0–15.7°C
December	2%	14%	4%	9%	2.9–9.3°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.

1947Each stripe is one year’s mean temperature against the 79-year average. Warmest: 2012. Coolest: 1979.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4272321
NOAA station: USW00013996 · TOPEKA ASOS
Station distance: 5.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 39.08°, 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 TOPEKA ASOS is what differs

Topeka→Silver Lake→Rossville→Meriden→Willard→Belmont→

Or put two places side by side: Grantville vs Topeka

Best time to visitGrantville.