United States · 1991–2020

Best time to visit
Roscommon.

August leads for comfortable weather in Roscommon: typically 25.6°C by day, 12.1°C at night, with 73 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortAugust

Typical high25.6°C

Typical low12.1°C

Rain in August73 mm

Comfort

August

August · June · July

80climate match

Beach

July

July · August · June

60climate match

Outdoors

September

September · May · June

82climate match

The weakest month is January, scoring 5 against August’s 80 — days reach only -3.1°C, 27° 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

5-3.1° / -11.1°

Feb

5-1.5° / -11.4°

Mar

54.5° / -6.9°

Apr

2011.9° / -0.4°

May

5719.4° / 6°

Jun

7924.7° / 10.9°

Jul

7826.8° / 13°

Aug

8025.6° / 12.1°

Sep

7021.3° / 8.1°

Oct

3213.6° / 2.9°

Nov

56° / -2°

Dec

5-0.1° / -6.9°

Monthly climate evidence for Roscommon — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	-3.1°C	-11.1°C	43 mm	8.7	9 h 11	5	Strong coverage
February	-1.5°C	-11.4°C	36 mm	7	10 h 22	5	Strong coverage
March	4.5°C	-6.9°C	45 mm	7.6	11 h 46	5	Strong coverage
April	11.9°C	-0.4°C	79 mm	9.4	13 h 24	20	Strong coverage
May	19.4°C	6°C	80 mm	8.6	14 h 46	57	Strong coverage
June	24.7°C	10.9°C	82 mm	8.6	15 h 32	79	Strong coverage
July	26.8°C	13°C	70 mm	7.4	15 h 14	78	Strong coverage
August	25.6°C	12.1°C	73 mm	7.7	14 h 02	80	Strong coverage
September	21.3°C	8.1°C	66 mm	7.7	12 h 28	70	Strong coverage
October	13.6°C	2.9°C	78 mm	9.7	10 h 54	32	Strong coverage
November	6°C	-2°C	56 mm	9	9 h 31	5	Strong coverage
December	-0.1°C	-6.9°C	45 mm	8.7	8 h 51	5	Strong coverage

What has changed

Roscommon runs +1.1°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

+0.8

Feb

+0.7

Mar

+1.3

Apr

-0.2

May

+1.1

Jun

+1.4

Jul

+0.9

Aug

+1.3

Sep

+2.1

Oct

+1.6

Nov

+0.8

Dec

+1.7

August daytime highs, 2011–2025. Last recorded: 26.2°C.

Records at HOUGHTON LAKE ROSCOMMON CO AP, 1964–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	12.2°C18 Jan 1996	-32.2°C4 Jan 1981	31 mm29 Jan 2013	90 mm2013 · driest 5 mm in 2003	62
February	20.6°C27 Feb 2024	-36.7°C17 Feb 1979	37 mm21 Feb 1997	86 mm1971 · driest 4 mm in 2003	62
March	29.4°C21 Mar 2012	-31.0°C3 Mar 2014	56 mm29 Mar 2025	147 mm2025 · driest 5 mm in 2001	62
April	30.0°C22 Apr 1980	-16.7°C6 Apr 2003	75 mm12 Apr 2026	205 mm2026 · driest 19 mm in 2005	62
May	32.8°C27 May 2018	-6.1°C2 May 1966	76 mm18 May 2020	188 mm2004 · driest 10 mm in 1966	62
June	39.4°C19 Jun 1995	-1.7°C1 Jun 1998	72 mm5 Jun 2008	234 mm2008 · driest 22 mm in 1988	62
July	36.7°C20 Jul 1987	0.6°C6 Jul 1965	90 mm10 Jul 1984	156 mm2010 · driest 14 mm in 1989	63
August	35.6°C8 Aug 2001	-1.7°C29 Aug 1982	79 mm7 Aug 1981	182 mm1975 · driest 22 mm in 1969	62
September	33.3°C7 Sep 1985	-6.1°C27 Sep 1989	58 mm10 Sep 1986	241 mm1986 · driest 0 mm in 1979	62
October	30.6°C4 Oct 2025	-8.9°C23 Oct 1969	101 mm23 Oct 2017	205 mm1991 · driest 12 mm in 1971	62
November	22.8°C9 Nov 2020	-20.6°C29 Nov 1995	46 mm27 Nov 1966	129 mm1988 · driest 12 mm in 1986	62
December	17.8°C5 Dec 2001	-29.4°C30 Dec 1976	43 mm10 Dec 1971	117 mm2008 · driest 9 mm in 1997	62

Typical days per month at HOUGHTON LAKE ROSCOMMON CO AP, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	30	1	13
February	0	0	28	<1	11
March	<1	0	27	1	6
April	<1	0	18	3	3
May	6	1	4	3	<1
June	16	4	<1	3	0
July	23	6	0	2	0
August	20	4	<1	3	0
September	8	1	2	2	0
October	<1	0	10	2	<1
November	0	0	21	2	6
December	0	0	29	1	11

How often, not how much — every day in HOUGHTON LAKE ROSCOMMON CO AP’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%	28%	3%	32%	-6.4–-0.3°C
February	<1%	25%	3%	27%	-4.3–1.4°C
March	1%	26%	5%	32%	1.3–7.4°C
April	9%	31%	7%	36%	9.2–14.5°C
May	37%	27%	8%	31%	16.0–22.3°C
June	63%	28%	9%	32%	22.4–26.3°C
July	74%	24%	7%	23%	24.8–28.9°C
August	71%	25%	9%	25%	23.1–26.9°C
September	46%	28%	8%	34%	18.9–23.2°C
October	11%	30%	6%	36%	10.9–16.2°C
November	<1%	30%	5%	37%	2.5–9.1°C
December	0%	30%	4%	37%	-3.1–2.3°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.

1965Each stripe is one year’s mean temperature against the 61-year average. Warmest: 2024. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5007585
NOAA station: USW00094814 · HOUGHTON LAKE ROSCOMMON CO AP
Station distance: 16.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 44.50°, 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 HOUGHTON LAKE ROSCOMMON CO AP is what differs

Prudenville→Artesia Beach→Au Sable River Park→Geels→Higgins Lake→Hillcrest→

Or put two places side by side: Roscommon vs Prudenville

Best time to visitRoscommon.