United States · 1991–2020

Best time to visit
Rocky Hill.

September leads for comfortable weather in Rocky Hill: typically 25.2°C by day, 12.7°C at night, with 111 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.2°C

Typical low12.7°C

Rain in September111 mm

Comfort

September

September · June · May

77climate match

Beach

August

August · July · June

64climate match

Outdoors

May

May · October · September

69climate match

The weakest month is January, scoring 5 against September’s 77 — days reach only 3.8°C, 20° 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

53.8° / -5.7°

Feb

55.3° / -4.9°

Mar

79.7° / -1.5°

Apr

4016.7° / 4°

May

6622.2° / 9.8°

Jun

7226.9° / 14.7°

Jul

5529.7° / 17.5°

Aug

6428.6° / 16.5°

Sep

7725.2° / 12.7°

Oct

4918.3° / 6.6°

Nov

2511.9° / 1.1°

Dec

56.4° / -2.8°

Monthly climate evidence for Rocky Hill — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	3.8°C	-5.7°C	99 mm	9.6	9 h 35	5	Good coverage
February	5.3°C	-4.9°C	78 mm	8.4	10 h 36	5	Good coverage
March	9.7°C	-1.5°C	108 mm	9.4	11 h 49	7	Good coverage
April	16.7°C	4°C	108 mm	10	13 h 13	40	Good coverage
May	22.2°C	9.8°C	117 mm	11.5	14 h 24	66	Good coverage
June	26.9°C	14.7°C	118 mm	10.3	15 h 02	72	Good coverage
July	29.7°C	17.5°C	147 mm	10.1	14 h 47	55	Good coverage
August	28.6°C	16.5°C	125 mm	9.2	13 h 46	64	Good coverage
September	25.2°C	12.7°C	111 mm	7.8	12 h 25	77	Good coverage
October	18.3°C	6.6°C	118 mm	9.3	11 h 03	49	Good coverage
November	11.9°C	1.1°C	82 mm	7.5	9 h 53	25	Good coverage
December	6.4°C	-2.8°C	117 mm	10.1	9 h 18	5	Good coverage

Records at WERTSVILLE 4 NE, 1995–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C7 Jan 2007	-18.9°C29 Jan 2005	74 mm10 Jan 2024	211 mm1999 · driest 16 mm in 2025	26
February	25.0°C22 Feb 2018	-19.4°C24 Feb 2015	61 mm13 Feb 2008	164 mm2018 · driest 17 mm in 2026	27
March	31.1°C31 Mar 1998	-16.1°C6 Mar 2015	89 mm14 Mar 2010	252 mm2010 · driest 29 mm in 2006	28
April	32.8°C27 Apr 2009	-5.0°C5 Apr 2016	123 mm16 Apr 2007	303 mm2007 · driest 41 mm in 2016	28
May	35.0°C21 May 1996	-1.1°C15 May 1996	77 mm1 May 2014	221 mm1998 · driest 35 mm in 2015	28
June	36.1°C20 Jun 2025	3.3°C1 Jun 2001	72 mm8 Jun 2013	254 mm2006 · driest 17 mm in 1999	28
July	38.9°C7 Jul 1999	8.3°C20 Jul 1997	165 mm25 Jul 1997	263 mm2004 · driest 24 mm in 1999	28
August	38.3°C10 Aug 2001	6.7°C21 Aug 1998	177 mm28 Aug 2011	436 mm2011 · driest 33 mm in 2025	28
September	35.6°C2 Sep 2010	0.6°C30 Sep 2000	230 mm17 Sep 1999	378 mm1999 · driest 20 mm in 2019	27
October	33.3°C3 Oct 2019	-3.3°C23 Oct 1997	105 mm9 Oct 2005	337 mm2005 · driest 0 mm in 2024	27
November	27.2°C1 Nov 2024	-12.8°C24 Nov 2018	73 mm27 Nov 2013	228 mm2018 · driest 18 mm in 2021	27
December	24.4°C8 Dec 1998	-16.7°C23 Dec 2024	83 mm18 Dec 2023	260 mm1996 · driest 26 mm in 1998	27

Typical days per month at WERTSVILLE 4 NE, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	26	3	4
February	0	0	24	3	3
March	<1	0	21	4	2
April	3	<1	6	3	<1
May	10	3	<1	4	0
June	21	8	0	4	0
July	29	16	0	4	0
August	26	11	0	4	0
September	16	4	0	3	0
October	3	<1	3	4	<1
November	0	0	14	3	<1
December	0	0	23	4	2

How often, not how much — every day in WERTSVILLE 4 NE’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%	27%	10%	31%	0.5–7.0°C
February	<1%	27%	9%	29%	1.1–8.3°C
March	6%	27%	10%	32%	6.9–12.9°C
April	22%	31%	11%	38%	15.0–18.4°C
May	49%	33%	12%	45%	20.2–24.0°C
June	65%	30%	11%	34%	25.7–28.4°C
July	67%	30%	13%	35%	27.8–31.2°C
August	71%	27%	11%	28%	26.9–30.0°C
September	69%	25%	10%	26%	23.7–26.9°C
October	31%	24%	10%	24%	17.4–20.7°C
November	6%	26%	10%	27%	9.4–14.3°C
December	<1%	28%	12%	31%	3.6–9.6°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.

1997Each stripe is one year’s mean temperature against the 24-year average. Warmest: 2012. Coolest: 1997.2024

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 5103424
NOAA station: USC00289363 · WERTSVILLE 4 NE
Station distance: 13.6 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 21 usable years
Daylight: Calculated from latitude 40.40°, 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 WERTSVILLE 4 NE is what differs

Hillsborough→Bloomingdale→Ten Mile Run→Hopewell→Griggstown→East Rocky Hill→

Or put two places side by side: Rocky Hill vs Hillsborough

Best time to visitRocky Hill.

September

August

May

The whole year,without the guesswork.

Nearby, measured,and named.

Best time to visit
Rocky Hill.

The whole year,
without the guesswork.

Nearby, measured,
and named.