United States · 1991–2020

Best time to visit
Green Hill.

September leads for comfortable weather in Green Hill: typically 25.6°C by day, 11.3°C at night, with 79 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.6°C

Typical low11.3°C

Rain in September79 mm

Comfort

September

September · August · May

79climate match

Beach

July

July · August · June

70climate match

Outdoors

October

October · September · May

75climate match

The weakest month is January, scoring 5 against September’s 79 — days reach only 0.7°C, 23° 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

50.7° / -8.6°

Feb

53.2° / -6.8°

Mar

149.5° / -1.7°

Apr

4116.8° / 4.1°

May

7022.9° / 10.6°

Jun

6827.7° / 15.8°

Jul

6528.9° / 17°

Aug

7328.1° / 15.7°

Sep

7925.6° / 11.3°

Oct

5518.6° / 5.3°

Nov

1710.3° / -0.2°

Dec

53.5° / -5.4°

Monthly climate evidence for Green Hill — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	0.7°C	-8.6°C	55 mm	7	9 h 35	5	Strong coverage
February	3.2°C	-6.8°C	49 mm	6.8	10 h 36	5	Strong coverage
March	9.5°C	-1.7°C	65 mm	7.7	11 h 49	14	Strong coverage
April	16.8°C	4.1°C	101 mm	9.7	13 h 13	41	Strong coverage
May	22.9°C	10.6°C	120 mm	10.6	14 h 24	70	Strong coverage
June	27.7°C	15.8°C	122 mm	9.8	15 h 02	68	Strong coverage
July	28.9°C	17°C	109 mm	8.3	14 h 47	65	Strong coverage
August	28.1°C	15.7°C	93 mm	7	13 h 46	73	Strong coverage
September	25.6°C	11.3°C	79 mm	6.4	12 h 25	79	Strong coverage
October	18.6°C	5.3°C	77 mm	7.6	11 h 03	55	Strong coverage
November	10.3°C	-0.2°C	77 mm	7.8	9 h 53	17	Strong coverage
December	3.5°C	-5.4°C	60 mm	7.5	9 h 18	5	Strong coverage

What has changed

Green Hill runs +1.3°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

+1.4

Feb

+1.7

Mar

+2.2

Apr

+0.8

May

+1.4

Jun

+1.2

Jul

+0.4

Aug

+0.5

Sep

+1.6

Oct

+1.3

Nov

+0.3

Dec

+2.6

September daytime highs, 2011–2025. Last recorded: 28.7°C.

Records at W LAFAYETTE 6 NW, 1901–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	20.0°C20 Jan 1906	-31.1°C20 Jan 1985	55 mm30 Jan 1982	188 mm1916 · driest 1 mm in 2022	121
February	23.3°C27 Feb 2024	-30.6°C26 Feb 1963	75 mm26 Feb 1936	182 mm1908 · driest 0 mm in 2026	121
March	31.1°C27 Mar 2026	-24.4°C1 Mar 1960	98 mm11 Mar 1990	184 mm1904 · driest 7 mm in 1981	120
April	32.2°C11 Apr 1930	-13.9°C7 Apr 1982	95 mm12 Apr 1994	231 mm2013 · driest 18 mm in 1971	120
May	36.1°C29 May 2018	-4.4°C9 May 2020	122 mm28 May 2000	323 mm1943 · driest 10 mm in 1934	120
June	40.0°C1 Jun 1934	1.7°C22 Jun 1992	109 mm26 Jun 1978	297 mm1958 · driest 6 mm in 1988	120
July	43.9°C14 Jul 1936	5.6°C6 Jul 1972	123 mm18 Jul 1939	282 mm1992 · driest 7 mm in 1914	119
August	39.4°C9 Aug 1934	1.7°C29 Aug 1965	104 mm14 Aug 1926	240 mm1977 · driest 14 mm in 1996	120
September	37.8°C9 Sep 1933	-3.9°C23 Sep 1995	98 mm15 Sep 1965	300 mm1926 · driest 0 mm in 1979	120
October	33.9°C4 Oct 2025	-7.8°C30 Oct 1925	79 mm22 Oct 1983	226 mm2001 · driest 5 mm in 2024	120
November	26.1°C9 Nov 2023	-19.4°C28 Nov 1930	103 mm3 Nov 1936	221 mm1985 · driest 2 mm in 1904	120
December	21.7°C3 Dec 1982	-30.0°C22 Dec 1989	55 mm18 Dec 1924	197 mm1924 · driest 2 mm in 1958	120

Typical days per month at W LAFAYETTE 6 NW, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	2	4
February	0	0	25	1	4
March	<1	<1	21	2	2
April	4	<1	7	3	<1
May	12	4	<1	4	0
June	24	10	0	4	0
July	28	13	0	4	0
August	27	10	0	3	0
September	17	6	<1	3	0
October	6	<1	5	3	0
November	<1	0	16	3	<1
December	0	0	26	2	3

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 86); on 2011–2025 it is May (83). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in W LAFAYETTE 6 NW’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%	23%	6%	23%	-3.0–4.8°C
February	<1%	23%	5%	22%	-1.2–7.3°C
March	7%	28%	8%	33%	5.9–13.5°C
April	22%	33%	11%	43%	13.7–19.0°C
May	48%	33%	11%	43%	19.7–25.6°C
June	68%	30%	12%	36%	25.6–30.1°C
July	75%	25%	11%	25%	27.6–32.3°C
August	76%	23%	9%	22%	26.7–30.8°C
September	68%	23%	9%	23%	23.4–28.0°C
October	36%	23%	8%	25%	16.3–22.2°C
November	6%	26%	8%	26%	6.8–13.1°C
December	<1%	25%	6%	26%	-0.2–7.0°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.

1901Each stripe is one year’s mean temperature against the 119-year average. Warmest: 1931. Coolest: 2014.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4920927
NOAA station: USC00129430 · W LAFAYETTE 6 NW
Station distance: 12.2 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 30 usable years
Daylight: Calculated from latitude 40.41°, 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 W LAFAYETTE 6 NW is what differs

Battle Ground→Otterbein→Montmorenci→Ash Grove→Cairo→Foresman→

Or put two places side by side: Green Hill vs Battle Ground

Best time to visitGreen Hill.