United States · 1991–2020

Best time to visit
Monument.

September leads for comfortable weather in Monument: typically 27.5°C by day, 10.3°C at night, with 46 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high27.5°C

Typical low10.3°C

Rain in September46 mm

Comfort

September

September · May · June

77climate match

Beach

August

August · June · September

66climate match

Outdoors

October

October · April · September

85climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 5.8°C, 18° below the 24°C the score treats as ideal, and nights drop to -9.3°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

55.8° / -9.3°

Feb

57.3° / -8.2°

Mar

3013.2° / -3.8°

Apr

5218.1° / 1°

May

7423.4° / 7.2°

Jun

6930.2° / 13.6°

Jul

5433.1° / 16.6°

Aug

6531.7° / 15.4°

Sep

7727.5° / 10.3°

Oct

6219.8° / 2.8°

Nov

2812.3° / -3.8°

Dec

56.4° / -8.5°

Monthly climate evidence for Monument — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	5.8°C	-9.3°C	9 mm	1.8	9 h 42	5	Strong coverage
February	7.3°C	-8.2°C	13 mm	2.9	10 h 40	5	Strong coverage
March	13.2°C	-3.8°C	26 mm	3.6	11 h 50	30	Strong coverage
April	18.1°C	1°C	45 mm	5.4	13 h 10	52	Strong coverage
May	23.4°C	7.2°C	77 mm	7.4	14 h 17	74	Strong coverage
June	30.2°C	13.6°C	67 mm	7.4	14 h 54	69	Strong coverage
July	33.1°C	16.6°C	97 mm	7.4	14 h 40	54	Strong coverage
August	31.7°C	15.4°C	71 mm	6.8	13 h 42	65	Strong coverage
September	27.5°C	10.3°C	46 mm	4.5	12 h 24	77	Strong coverage
October	19.8°C	2.8°C	41 mm	4.3	11 h 06	62	Strong coverage
November	12.3°C	-3.8°C	17 mm	2.5	9 h 59	28	Strong coverage
December	6.4°C	-8.5°C	12 mm	2.2	9 h 26	5	Strong coverage

What has changed

Monument runs +0.1°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

-0.1

Feb

-2.4

Mar

+0.4

Apr

-1.1

May

-0.8

Jun

+1.0

Jul

+0.2

Aug

+0.1

Sep

+2.0

Oct

-0.5

Nov

+1.5

Dec

+0.8

September daytime highs, 2011–2025. Last recorded: 28.6°C.

Records at OAKLEY 4W, 1920–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	27.8°C12 Jan 1953	-28.9°C17 Jan 1930	41 mm27 Jan 1944	63 mm1944 · driest 0 mm in 1975	104
February	29.4°C19 Feb 2016	-32.8°C16 Feb 2021	32 mm24 Feb 2020	60 mm1960 · driest 0 mm in 1991	104
March	35.0°C22 Mar 2026	-28.3°C11 Mar 1948	57 mm15 Mar 1946	102 mm1979 · driest 0 mm in 1997	105
April	35.6°C23 Apr 1989	-18.9°C2 Apr 1936	115 mm18 Apr 1942	187 mm1944 · driest 2 mm in 2020	106
May	39.4°C30 May 2003	-5.0°C3 May 2013	97 mm11 May 2017	192 mm2017 · driest 12 mm in 1966	106
June	43.9°C25 Jun 2012	0.6°C6 Jun 1998	90 mm29 Jun 2014	292 mm1951 · driest 4 mm in 1981	105
July	43.9°C24 Jul 1936	5.0°C12 Jul 1990	91 mm16 Jul 1994	250 mm1941 · driest 6 mm in 2003	106
August	42.2°C6 Aug 1934	5.0°C24 Aug 1928	83 mm1 Aug 1975	220 mm1950 · driest 2 mm in 1976	105
September	40.6°C7 Sep 2000	-5.6°C25 Sep 1926	122 mm8 Sep 2009	198 mm2009 · driest 0 mm in 1979	104
October	36.1°C6 Oct 2024	-16.7°C28 Oct 2020	98 mm4 Oct 1930	229 mm1946 · driest 0 mm in 1988	104
November	30.6°C5 Nov 1945	-23.3°C13 Nov 1940	67 mm16 Nov 1971	93 mm1946 · driest 0 mm in 2012	105
December	28.9°C23 Dec 1964	-29.4°C22 Dec 1989	48 mm30 Dec 2006	102 mm2006 · driest 0 mm in 1976	103

Typical days per month at OAKLEY 4W, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	31	<1	3
February	<1	0	27	<1	3
March	2	<1	24	<1	2
April	6	1	13	1	1
May	14	5	2	2	<1
June	25	16	0	2	0
July	29	24	0	3	0
August	28	20	0	2	0
September	20	12	<1	1	0
October	8	3	9	1	<1
November	2	<1	24	<1	1
December	0	0	30	<1	3

The best month has moved. On the 1961–1990 numbers the strongest month here was September (scoring 82); on 2011–2025 it is May (77). Both are scored the same way, from the same station — only the climate underneath changed.

How often, not how much — every day in OAKLEY 4W’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	3%	7%	<1%	2%	1.7–10.6°C
February	9%	10%	1%	6%	3.4–13.5°C
March	24%	13%	3%	7%	9.3–17.5°C
April	46%	17%	5%	15%	16.2–21.9°C
May	62%	25%	8%	28%	21.6–26.9°C
June	74%	24%	9%	24%	27.6–33.2°C
July	79%	21%	9%	19%	30.8–35.9°C
August	80%	19%	7%	15%	29.5–34.8°C
September	80%	13%	4%	8%	25.2–30.8°C
October	59%	11%	3%	8%	18.1–24.4°C
November	18%	8%	2%	4%	9.5–15.9°C
December	4%	7%	1%	3%	4.0–10.9°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.

1923Each stripe is one year’s mean temperature against the 95-year average. Warmest: 1934. Coolest: 1993.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5446007
NOAA station: USC00145888 · OAKLEY 4W
Station distance: 5.5 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 39.10°, 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 OAKLEY 4W is what differs

Oakley→Grinnell→Angelus→Spica→Patterson Mobile Home Park→

Or put two places side by side: Monument vs Oakley

Best time to visitMonument.