United States · 1991–2020

Best time to visit
Warsaw.

September leads for comfortable weather in Warsaw: typically 26.6°C by day, 13.3°C at night, with 84 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high26.6°C

Typical low13.3°C

Rain in September84 mm

Comfort

September

September · May · August

78climate match

Beach

August

August · July · June

75climate match

Outdoors

October

October · April · September

80climate match

The weakest month is January, scoring 5 against September’s 78 — days reach only 6°C, 18° below the 24°C the score treats as ideal, and nights drop to -5.3°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

56° / -5.3°

Feb

58° / -4.3°

Mar

2113.3° / -0.1°

Apr

4819.8° / 5.2°

May

6924.4° / 11°

Jun

6528.5° / 16.1°

Jul

5730.3° / 18.3°

Aug

6629.8° / 17.6°

Sep

7826.6° / 13.3°

Oct

6320.4° / 6.8°

Nov

2813.6° / 0.7°

Dec

57.8° / -2.9°

Monthly climate evidence for Warsaw — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	6°C	-5.3°C	83 mm	8.2	9 h 44	5	Strong coverage
February	8°C	-4.3°C	84 mm	7.6	10 h 41	5	Strong coverage
March	13.3°C	-0.1°C	109 mm	9.7	11 h 50	21	Strong coverage
April	19.8°C	5.2°C	132 mm	11	13 h 09	48	Strong coverage
May	24.4°C	11°C	143 mm	11.4	14 h 16	69	Strong coverage
June	28.5°C	16.1°C	123 mm	9.3	14 h 52	65	Strong coverage
July	30.3°C	18.3°C	115 mm	9	14 h 38	57	Strong coverage
August	29.8°C	17.6°C	86 mm	6.4	13 h 40	66	Strong coverage
September	26.6°C	13.3°C	84 mm	6.7	12 h 23	78	Strong coverage
October	20.4°C	6.8°C	85 mm	7	11 h 07	63	Strong coverage
November	13.6°C	0.7°C	89 mm	8.1	10 h 00	28	Strong coverage
December	7.8°C	-2.9°C	98 mm	9.4	9 h 28	5	Strong coverage

What has changed

Warsaw 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

+1.8

Feb

+2.3

Mar

+1.5

Apr

+1.2

May

+0.4

Jun

+0.5

Jul

+0.3

Aug

-0.1

Sep

+0.6

Oct

+0.6

Nov

+0.3

Dec

+2.5

September daytime highs, 2011–2025. Last recorded: 28.1°C.

Records at WARSAW MARKLAND DAM, 1959–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	22.2°C25 Jan 1967	-30.6°C19 Jan 1994	77 mm23 Jan 1982	169 mm2023 · driest 8 mm in 1981	65
February	26.1°C20 Feb 2018	-24.4°C20 Feb 2015	82 mm24 Feb 2018	282 mm2018 · driest 8 mm in 1978	64
March	31.1°C23 Mar 2026	-22.8°C4 Mar 1980	85 mm10 Mar 1964	310 mm1964 · driest 24 mm in 2009	66
April	31.7°C23 Apr 1960	-10.0°C1 Apr 1969	73 mm25 Apr 1975	355 mm2011 · driest 22 mm in 2001	67
May	35.0°C18 May 1962	-3.3°C10 May 1966	82 mm19 May 2018	311 mm1996 · driest 24 mm in 1964	67
June	38.9°C26 Jun 1988	0.0°C2 Jun 2012	93 mm19 Jun 1992	250 mm2019 · driest 16 mm in 1988	67
July	40.0°C10 Jul 1988	4.4°C2 Jul 2008	98 mm8 Jul 2014	235 mm1961 · driest 25 mm in 1983	68
August	40.0°C21 Aug 1983	4.4°C30 Aug 2009	112 mm26 Aug 1971	245 mm2022 · driest 9 mm in 2010	67
September	38.3°C3 Sep 2011	-1.1°C24 Sep 2012	130 mm14 Sep 1979	249 mm1965 · driest 1 mm in 2019	66
October	34.4°C2 Oct 2019	-7.8°C25 Oct 1981	123 mm21 Oct 1983	328 mm1983 · driest 10 mm in 2024	66
November	28.3°C2 Nov 1961	-16.7°C30 Nov 1976	97 mm15 Nov 2005	191 mm2005 · driest 16 mm in 1976	67
December	24.4°C15 Dec 2015	-28.3°C23 Dec 1989	56 mm18 Dec 2016	202 mm1990 · driest 16 mm in 1976	67

Typical days per month at WARSAW MARKLAND DAM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	20	3	2
February	<1	0	18	3	1
March	1	<1	13	4	<1
April	6	<1	4	4	0
May	16	4	<1	4	0
June	26	13	0	4	0
July	30	18	0	4	0
August	30	16	0	3	0
September	20	7	<1	3	0
October	7	<1	2	3	0
November	<1	0	12	3	0
December	0	0	18	3	1

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 82); on 2011–2025 it is May (81). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in WARSAW MARKLAND DAM’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%	26%	9%	30%	1.8–8.6°C
February	3%	27%	9%	31%	3.7–11.3°C
March	13%	32%	12%	40%	9.3–16.3°C
April	35%	34%	13%	45%	16.8–21.3°C
May	57%	33%	13%	42%	21.8–27.0°C
June	70%	30%	13%	35%	26.5–29.8°C
July	72%	28%	12%	30%	28.7–32.4°C
August	78%	22%	10%	19%	28.2–31.4°C
September	75%	22%	8%	21%	24.7–28.5°C
October	46%	23%	9%	23%	18.3–22.2°C
November	13%	28%	10%	32%	10.2–16.3°C
December	1%	29%	10%	35%	3.7–10.6°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.

1960Each stripe is one year’s mean temperature against the 58-year average. Warmest: 2024. Coolest: 1978.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4312734
NOAA station: USC00158446 · WARSAW MARKLAND DAM
Station distance: 5.7 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 27 usable years
Daylight: Calculated from latitude 38.78°, 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 WARSAW MARKLAND DAM is what differs

Bromley→Glencoe→Sparta→Sanders→Patriot→East Enterprise→

Or put two places side by side: Warsaw vs Bromley

Best time to visitWarsaw.