United States · 1991–2020

Best time to visit
Naplate.

September leads for comfortable weather in Naplate: typically 25.3°C by day, 12.3°C at night, with 85 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.3°C

Typical low12.3°C

Rain in September85 mm

Comfort

September

September · June · May

80climate match

Beach

July

July · August · June

77climate match

Outdoors

October

October · May · September

76climate match

The weakest month is January, scoring 5 against September’s 80 — days reach only 0°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

50° / -9.3°

Feb

52.5° / -7.3°

Mar

159.5° / -1.7°

Apr

4316.9° / 4°

May

7022.8° / 10.5°

Jun

7227.4° / 15.8°

Jul

6629.1° / 18°

Aug

7028.3° / 16.8°

Sep

8025.3° / 12.3°

Oct

5618.5° / 5.9°

Nov

199.9° / -0.3°

Dec

52.9° / -6.1°

Monthly climate evidence for Naplate — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0°C	-9.3°C	47 mm	6.8	9 h 30	5	Strong coverage
February	2.5°C	-7.3°C	40 mm	5.7	10 h 33	5	Strong coverage
March	9.5°C	-1.7°C	57 mm	7	11 h 48	15	Strong coverage
April	16.9°C	4°C	87 mm	10	13 h 15	43	Strong coverage
May	22.8°C	10.5°C	114 mm	10.4	14 h 29	70	Strong coverage
June	27.4°C	15.8°C	108 mm	8.9	15 h 09	72	Strong coverage
July	29.1°C	18°C	91 mm	7.2	14 h 53	66	Strong coverage
August	28.3°C	16.8°C	97 mm	7.4	13 h 50	70	Strong coverage
September	25.3°C	12.3°C	85 mm	6.8	12 h 25	80	Strong coverage
October	18.5°C	5.9°C	77 mm	7.5	11 h 01	56	Strong coverage
November	9.9°C	-0.3°C	63 mm	6.8	9 h 48	19	Strong coverage
December	2.9°C	-6.1°C	50 mm	6.6	9 h 12	5	Strong coverage

What has changed

Naplate runs -0.3°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

+0.4

Feb

-0.4

Mar

+0.5

Apr

-0.9

May

-0.8

Jun

-1.1

Jul

-1.4

Aug

-0.9

Sep

+0.2

Oct

-0.4

Nov

-0.8

Dec

+1.7

September daytime highs, 2011–2025. Last recorded: 27.0°C.

Records at OTTAWA 4SW, 1892–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.0°C23 Jan 1909	-32.2°C17 Jan 1893	51 mm3 Jan 1897	152 mm1897 · driest 0 mm in 1917	131
February	22.8°C15 Feb 1921	-30.6°C9 Feb 1899	72 mm21 Feb 1997	121 mm1997 · driest 0 mm in 1987	132
March	29.4°C22 Mar 2012	-22.8°C3 Mar 2014	93 mm19 Mar 1948	173 mm1948 · driest 3 mm in 1917	133
April	33.9°C11 Apr 1930	-11.1°C2 Apr 1899	114 mm30 Apr 2017	246 mm1950 · driest 0 mm in 1919	134
May	41.1°C31 May 1934	-3.3°C10 May 1966	81 mm17 May 1974	252 mm2019 · driest 0 mm in 1917	133
June	41.7°C1 Jun 1934	1.7°C4 Jun 1929	86 mm12 Jun 1929	268 mm1970 · driest 7 mm in 1988	133
July	44.4°C14 Jul 1936	3.9°C19 Jul 1920	223 mm14 Jul 1958	377 mm1958 · driest 2 mm in 1916	134
August	41.7°C5 Aug 1918	0.6°C30 Aug 1915	168 mm9 Aug 1924	362 mm2007 · driest 7 mm in 1950	131
September	39.4°C5 Sep 1899	-3.9°C28 Sep 1942	112 mm28 Sep 2019	363 mm1926 · driest 0 mm in 2017	129
October	34.4°C6 Oct 1963	-10.6°C28 Oct 1925	85 mm25 Oct 2021	245 mm1941 · driest 0 mm in 1964	129
November	28.3°C1 Nov 1950	-21.1°C28 Nov 1930	56 mm5 Nov 1902	245 mm1985 · driest 0 mm in 2007	131
December	21.7°C4 Dec 2012	-30.6°C28 Dec 1924	71 mm24 Dec 1965	149 mm2015 · driest 0 mm in 1918	131

Typical days per month at OTTAWA 4SW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	1	5
February	0	0	25	1	3
March	1	0	21	2	2
April	4	<1	6	3	<1
May	12	3	<1	4	0
June	23	9	0	4	0
July	28	13	0	3	0
August	26	10	0	3	0
September	17	6	<1	3	0
October	6	<1	4	3	0
November	<1	0	17	2	<1
December	0	0	27	2	3

How often, not how much — every day in OTTAWA 4SW’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%	21%	4%	20%	-3.6–3.9°C
February	<1%	20%	4%	17%	-1.6–6.0°C
March	6%	25%	7%	29%	6.1–13.1°C
April	25%	31%	10%	37%	14.4–19.8°C
May	52%	31%	11%	40%	20.4–26.2°C
June	70%	28%	11%	31%	26.0–30.5°C
July	77%	23%	10%	23%	27.7–32.9°C
August	77%	23%	9%	22%	27.1–31.4°C
September	68%	23%	10%	24%	23.4–28.1°C
October	38%	21%	7%	22%	16.5–21.9°C
November	6%	22%	7%	21%	7.0–12.8°C
December	<1%	20%	5%	18%	-0.5–6.1°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.

1893Each stripe is one year’s mean temperature against the 120-year average. Warmest: 2012. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4903291
NOAA station: USC00116526 · OTTAWA 4SW
Station distance: 2.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 41.33°, 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 OTTAWA 4SW is what differs

Ottawa→Streator→Grand Ridge→Kangley→Leonore→Altmar→

Or put two places side by side: Naplate vs Ottawa

Best time to visitNaplate.