United States · 1991–2020

Best time to visit
Roslyn.

July leads for comfortable weather in Roslyn: typically 27.2°C by day, 11.9°C at night, with 12 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high27.2°C

Typical low11.9°C

Rain in July12 mm

Comfort

July

July · June · August

84climate match

Beach

July

July · August · June

69climate match

Outdoors

June

June · May · September

89climate match

The weakest month is January, scoring 5 against July’s 84 — days reach only 2.1°C, 22° 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

52.1° / -4.7°

Feb

54.9° / -4.5°

Mar

129.5° / -1.9°

Apr

3814° / 1.1°

May

6319° / 5.1°

Jun

8122.2° / 8.7°

Jul

8427.2° / 11.9°

Aug

8127.7° / 11.2°

Sep

8022.8° / 6.5°

Oct

3514.3° / 1.6°

Nov

56.3° / -2°

Dec

51.4° / -4.8°

Monthly climate evidence for Roslyn — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	2.1°C	-4.7°C	80 mm	11.9	8 h 52	5	Strong coverage
February	4.9°C	-4.5°C	59 mm	9.1	10 h 11	5	Good coverage
March	9.5°C	-1.9°C	55 mm	10.7	11 h 45	12	Strong coverage
April	14°C	1.1°C	35 mm	7.4	13 h 32	38	Strong coverage
May	19°C	5.1°C	31 mm	6.4	15 h 03	63	Strong coverage
June	22.2°C	8.7°C	24 mm	4.5	15 h 54	81	Good coverage
July	27.2°C	11.9°C	12 mm	2.2	15 h 34	84	Good coverage
August	27.7°C	11.2°C	8 mm	1.8	14 h 14	81	Good coverage
September	22.8°C	6.5°C	19 mm	3.5	12 h 30	80	Good coverage
October	14.3°C	1.6°C	60 mm	9.1	10 h 47	35	Strong coverage
November	6.3°C	-2°C	92 mm	11.8	9 h 16	5	Strong coverage
December	1.4°C	-4.8°C	88 mm	12.1	8 h 30	5	Good coverage

What has changed

Roslyn runs +0.2°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

-0.2

Feb

-1.4

Mar

-0.7

Apr

+0.2

May

+1.0

Jun

+0.7

Jul

+1.8

Aug

+1.8

Sep

+0.6

Oct

-0.9

Nov

0.0

Dec

-0.4

July daytime highs, 2011–2025. Last recorded: 29.2°C.

Records at CLE ELUM, 1899–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	13.9°C30 Jan 1976	-36.1°C31 Jan 1950	65 mm13 Jan 1900	226 mm1972 · driest 8 mm in 1985	120
February	20.6°C2 Feb 1962	-34.4°C1 Feb 1950	65 mm2 Feb 1916	179 mm1899 · driest 2 mm in 1973	117
March	26.1°C28 Mar 1930	-19.4°C4 Mar 2019	64 mm1 Mar 1899	149 mm1899 · driest 3 mm in 2020	120
April	35.6°C28 Apr 1931	-11.1°C1 Apr 1936	40 mm6 Apr 1962	85 mm1958 · driest 1 mm in 1951	120
May	37.2°C29 May 1983	-7.2°C1 May 1954	51 mm15 May 2011	113 mm1948 · driest 1 mm in 1967	122
June	42.2°C30 Jun 2021	-3.9°C3 Jun 1918	52 mm10 Jun 1948	88 mm1948 · driest 0 mm in 2025	119
July	40.6°C27 Jul 1939	-1.1°C6 Jul 1952	31 mm5 Jul 1994	45 mm1916 · driest 0 mm in 1929	118
August	40.6°C15 Aug 1967	-5.0°C24 Aug 1910	52 mm18 Aug 1975	71 mm1990 · driest 0 mm in 1942	120
September	37.2°C4 Sep 2025	-11.1°C26 Sep 1926	26 mm26 Sep 1948	72 mm1911 · driest 0 mm in 1991	118
October	31.1°C3 Oct 1958	-12.2°C25 Oct 1919	80 mm23 Oct 2017	152 mm1990 · driest 0 mm in 1952	120
November	22.2°C21 Nov 1917	-25.0°C23 Nov 1985	88 mm6 Nov 2006	242 mm1958 · driest 3 mm in 1929	120
December	16.7°C2 Dec 2021	-35.0°C30 Dec 1968	93 mm9 Dec 1933	367 mm1933 · driest 4 mm in 2000	118

Typical days per month at CLE ELUM, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	28	2	8
February	0	0	24	1	5
March	0	0	23	1	4
April	<1	0	12	<1	<1
May	5	<1	3	<1	<1
June	9	2	0	<1	0
July	20	10	0	<1	0
August	22	11	0	<1	0
September	10	3	2	<1	0
October	1	0	12	1	<1
November	0	0	21	2	4
December	0	0	28	2	9

The best month has moved. On the 1961–1990 numbers the strongest month here was July (scoring 84); on 2011–2025 it is June (87). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in CLE ELUM’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%	41%	10%	53%	-2.1–4.1°C
February	0%	36%	6%	48%	2.3–7.6°C
March	2%	31%	4%	35%	7.0–12.5°C
April	16%	21%	2%	20%	11.8–17.5°C
May	41%	17%	2%	12%	16.4–22.2°C
June	62%	14%	2%	10%	20.3–25.6°C
July	88%	6%	<1%	2%	25.1–29.7°C
August	87%	7%	<1%	5%	24.4–29.9°C
September	66%	14%	2%	13%	19.8–25.6°C
October	20%	24%	4%	31%	13.0–18.4°C
November	<1%	41%	10%	56%	4.6–9.3°C
December	0%	43%	11%	59%	-0.7–4.8°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.

1899Each stripe is one year’s mean temperature against the 101-year average. Warmest: 1958. Coolest: 1916.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5808841
NOAA station: USC00451504 · CLE ELUM
Station distance: 7.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 23 usable years
Daylight: Calculated from latitude 47.22°, 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 CLE ELUM is what differs

Cle Elum→South Cle Elum→Ronald→Bristol→Horlick→Lauderdale Junction→

Or put two places side by side: Roslyn vs Cle Elum

Best time to visitRoslyn.

July

July

June

The whole year,without the guesswork.

Roslyn runs +0.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Roslyn.

The whole year,
without the guesswork.

Roslyn runs +0.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.