United States · 1991–2020

Best time to visit
Black Hollow Junction.

September leads for comfortable weather in Black Hollow Junction: typically 25.1°C by day, 8.2°C at night, with 34 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.1°C

Typical low8.2°C

Rain in September34 mm

Comfort

September

September · June · August

82climate match

Beach

August

August · July · June

74climate match

Outdoors

May

May · September · October

79climate match

The weakest month is January, scoring 5 against September’s 82 — days reach only 6°C, 18° below the 24°C the score treats as ideal, and nights drop to -9.2°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° / -9.2°

Feb

57.2° / -7.6°

Mar

3012.8° / -3.1°

Apr

4416.2° / 0.9°

May

6621.1° / 6.2°

Jun

7827.4° / 11.1°

Jul

7330.9° / 14.2°

Aug

7629.5° / 13°

Sep

8225.1° / 8.2°

Oct

5317.5° / 1.3°

Nov

2110.6° / -4.5°

Dec

55.6° / -9.1°

Monthly climate evidence for Black Hollow Junction — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	6°C	-9.2°C	10 mm	2.4	9 h 34	5	Strong coverage
February	7.2°C	-7.6°C	11 mm	2.9	10 h 35	5	Strong coverage
March	12.8°C	-3.1°C	28 mm	4.1	11 h 49	30	Strong coverage
April	16.2°C	0.9°C	51 mm	6.1	13 h 14	44	Strong coverage
May	21.1°C	6.2°C	65 mm	8.2	14 h 25	66	Strong coverage
June	27.4°C	11.1°C	45 mm	5.9	15 h 04	78	Strong coverage
July	30.9°C	14.2°C	40 mm	5.4	14 h 48	73	Strong coverage
August	29.5°C	13°C	34 mm	4.9	13 h 47	76	Strong coverage
September	25.1°C	8.2°C	34 mm	4.9	12 h 25	82	Strong coverage
October	17.5°C	1.3°C	29 mm	4.3	11 h 03	53	Strong coverage
November	10.6°C	-4.5°C	18 mm	3.3	9 h 52	21	Strong coverage
December	5.6°C	-9.1°C	9 mm	2.8	9 h 17	5	Strong coverage

Records at FT COLLINS 4 E, 1990–2021
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	23.3°C26 Jan 2015	-26.1°C1 Jan 1995	20 mm7 Jan 1992	27 mm1992 · driest 0 mm in 2020	30
February	23.3°C10 Feb 2017	-32.2°C3 Feb 1996	13 mm1 Feb 2016	24 mm2010 · driest 0 mm in 1991	31
March	27.8°C26 Mar 2012	-25.0°C4 Mar 2019	58 mm18 Mar 2003	106 mm1992 · driest 0 mm in 2012	31
April	31.1°C30 Apr 1992	-16.7°C17 Apr 2020	54 mm30 Apr 1999	207 mm1999 · driest 4 mm in 2002	30
May	35.6°C29 May 2003	-9.4°C2 May 2013	52 mm8 May 2015	180 mm1995 · driest 19 mm in 2006	30
June	39.4°C24 Jun 2012	1.1°C6 Jun 1998	41 mm5 Jun 2008	106 mm2009 · driest 2 mm in 2006	30
July	39.4°C21 Jul 2005	6.7°C8 Jul 1994	55 mm20 Jul 2009	96 mm2009 · driest 2 mm in 2003	30
August	37.2°C16 Aug 2002	3.9°C27 Aug 1992	70 mm2 Aug 2007	107 mm1997 · driest 2 mm in 2012	30
September	37.8°C2 Sep 2019	-5.0°C22 Sep 1995	32 mm12 Sep 2013	154 mm2013 · driest 1 mm in 1992	30
October	31.7°C16 Oct 1991	-20.6°C27 Oct 2020	32 mm9 Oct 2014	86 mm2005 · driest 1 mm in 2003	31
November	26.7°C8 Nov 2006	-25.0°C24 Nov 1993	25 mm25 Nov 2019	47 mm1992 · driest 1 mm in 2008	31
December	21.1°C4 Dec 2007	-33.3°C22 Dec 1990	11 mm12 Dec 2015	27 mm2007 · driest 0 mm in 1996	31

Typical days per month at FT COLLINS 4 E, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	31	<1	4
February	0	0	27	0	5
March	<1	0	25	<1	4
April	3	<1	13	2	3
May	10	2	2	2	<1
June	22	10	0	2	0
July	29	20	0	1	0
August	27	16	0	<1	0
September	18	7	<1	1	<1
October	5	<1	11	<1	1
November	<1	0	26	<1	4
December	0	0	30	<1	4

How often, not how much — every day in FT COLLINS 4 E’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%	8%	<1%	3%	2.3–8.4°C
February	2%	10%	<1%	4%	4.1–11.0°C
March	16%	14%	3%	9%	9.9–15.8°C
April	33%	20%	5%	21%	12.9–19.3°C
May	52%	26%	7%	30%	18.0–23.6°C
June	79%	20%	6%	19%	24.3–30.3°C
July	82%	18%	4%	17%	29.0–32.7°C
August	84%	16%	3%	10%	27.0–31.3°C
September	74%	16%	4%	16%	22.4–27.4°C
October	42%	14%	3%	9%	15.2–19.9°C
November	10%	11%	2%	6%	6.9–13.5°C
December	<1%	9%	<1%	2%	1.8–7.6°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.

1991Each stripe is one year’s mean temperature against the 29-year average. Warmest: 2012. Coolest: 1993.2020

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5574859
NOAA station: USC00053006 · FT COLLINS 4 E
Station distance: 2.3 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 40.60°, 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 FT COLLINS 4 E is what differs

Windsor→Wellington→Severance→Timnath→Arrowhead→Bruce→

Or put two places side by side: Black Hollow Junction vs Windsor

Best time to visitBlack Hollow Junction.

September

August

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Black Hollow Junction.

The whole year,
without the guesswork.

Nearby, measured,
and named.