United States · 1991–2020

Best time to visit
Waterville.

September leads for comfortable weather in Waterville: typically 26.9°C by day, 12.6°C at night, with 85 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.9°C

Typical low12.6°C

Rain in September85 mm

Comfort

September

September · May · June

76climate match

Beach

August

August · June · July

72climate match

Outdoors

October

October · April · May

82climate match

The weakest month is January, scoring 5 against September’s 76 — days reach only 2.9°C, 21° below the 24°C the score treats as ideal, and nights drop to -9.2°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

52.9° / -9.2°

Feb

55.8° / -7°

Mar

2812.4° / -1.1°

Apr

5218.2° / 4.6°

May

7523.8° / 11°

Jun

6329.3° / 16.9°

Jul

5032° / 19.5°

Aug

6130.9° / 17.9°

Sep

7626.9° / 12.6°

Oct

6320.2° / 5.3°

Nov

2911.9° / -1.3°

Dec

55.2° / -6.8°

Monthly climate evidence for Waterville — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.9°C	-9.2°C	20 mm	3.4	9 h 39	5	Strong coverage
February	5.8°C	-7°C	27 mm	3.8	10 h 38	5	Strong coverage
March	12.4°C	-1.1°C	53 mm	5.1	11 h 49	28	Strong coverage
April	18.2°C	4.6°C	78 mm	7.6	13 h 11	52	Strong coverage
May	23.8°C	11°C	123 mm	8.8	14 h 20	75	Strong coverage
June	29.3°C	16.9°C	120 mm	7.9	14 h 58	63	Strong coverage
July	32°C	19.5°C	120 mm	7.6	14 h 43	50	Strong coverage
August	30.9°C	17.9°C	90 mm	6.6	13 h 44	61	Strong coverage
September	26.9°C	12.6°C	85 mm	6.3	12 h 24	76	Strong coverage
October	20.2°C	5.3°C	66 mm	6.1	11 h 05	63	Strong coverage
November	11.9°C	-1.3°C	39 mm	4.4	9 h 56	29	Strong coverage
December	5.2°C	-6.8°C	29 mm	3.8	9 h 22	5	Strong coverage

What has changed

Waterville runs +1.0°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

+1.7

Feb

+0.7

Mar

+2.1

Apr

-0.1

May

-0.1

Jun

+1.1

Jul

-0.5

Aug

-0.2

Sep

+2.0

Oct

+0.8

Nov

+1.6

Dec

+2.6

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

Records at MARYSVILLE, 1950–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C9 Jan 2003	-29.4°C12 Jan 1974	29 mm9 Jan 2026	63 mm1960 · driest 0 mm in 1953	76
February	28.9°C29 Feb 1972	-33.3°C15 Feb 2021	59 mm20 Feb 1954	112 mm2001 · driest 0 mm in 2006	76
March	35.0°C21 Mar 2026	-27.8°C4 Mar 1978	83 mm31 Mar 1993	151 mm1973 · driest 1 mm in 1968	76
April	36.1°C27 Apr 1989	-14.4°C3 Apr 1975	54 mm26 Apr 2016	196 mm1984 · driest 15 mm in 1989	76
May	38.9°C27 May 2018	-9.4°C21 May 2022	106 mm6 May 2007	267 mm1996 · driest 21 mm in 2012	76
June	42.2°C27 Jun 1980	1.7°C1 Jun 2021	114 mm18 Jun 1983	339 mm1951 · driest 15 mm in 2016	76
July	44.4°C14 Jul 1954	5.6°C5 Jul 1972	155 mm24 Jul 1972	599 mm1993 · driest 0 mm in 1974	74
August	43.3°C19 Aug 2023	6.7°C31 Aug 2009	91 mm25 Aug 1972	289 mm1977 · driest 6 mm in 1971	74
September	42.8°C3 Sep 2000	-2.8°C29 Sep 1984	178 mm3 Sep 2018	314 mm2018 · driest 2 mm in 1956	75
October	36.1°C4 Oct 1954	-11.7°C31 Oct 1993	94 mm11 Oct 1973	181 mm2007 · driest 0 mm in 1952	74
November	30.6°C1 Nov 1950	-19.4°C28 Nov 1976	54 mm12 Nov 2010	106 mm1998 · driest 0 mm in 1989	76
December	23.3°C15 Dec 2021	-32.8°C23 Dec 1989	72 mm13 Dec 2015	91 mm2018 · driest 0 mm in 1979	76

Typical days per month at MARYSVILLE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	29	<1	2
February	<1	0	25	<1	2
March	2	<1	19	2	<1
April	6	1	6	3	<1
May	14	5	<1	4	0
June	26	15	0	4	0
July	29	22	0	3	0
August	29	19	0	3	0
September	20	10	<1	2	0
October	9	2	6	2	<1
November	1	0	19	1	<1
December	0	0	28	<1	1

How often, not how much — every day in MARYSVILLE’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%	10%	2%	5%	-1.6–6.4°C
February	4%	12%	3%	7%	0.7–10.3°C
March	17%	17%	6%	15%	7.1–15.5°C
April	37%	24%	8%	25%	15.2–21.5°C
May	58%	29%	12%	35%	21.5–27.0°C
June	72%	27%	13%	32%	27.1–31.9°C
July	77%	23%	10%	22%	30.2–34.7°C
August	77%	23%	11%	22%	29.4–33.9°C
September	72%	22%	9%	20%	24.3–29.8°C
October	49%	17%	7%	15%	17.6–22.8°C
November	13%	12%	4%	6%	8.3–15.1°C
December	<1%	11%	2%	6%	1.5–8.2°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.

1951Each stripe is one year’s mean temperature against the 71-year average. Warmest: 2016. Coolest: 1951.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4281318
NOAA station: USC00145063 · MARYSVILLE
Station distance: 18.9 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 39.69°, 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 MARYSVILLE is what differs

Marysville→Blue Rapids→Frankfort→Odell→Beattie→Home→

Or put two places side by side: Waterville vs Marysville

Best time to visitWaterville.