United States · 1991–2020

Best time to visit
Carlow.

September leads for comfortable weather in Carlow: typically 25.2°C by day, 12.6°C at night, with 111 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortSeptember

Typical high25.2°C

Typical low12.6°C

Rain in September111 mm

Comfort

September

September · May · June

78climate match

Beach

August

August · July · June

71climate match

Outdoors

October

October · April · May

76climate match

The weakest month is January, scoring 5 against September’s 78 — days reach only 1.8°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

51.8° / -8.6°

Feb

55° / -6.5°

Mar

2211.2° / -1°

Apr

4817.5° / 4.9°

May

7023° / 11.1°

Jun

6328.3° / 16.8°

Jul

5430.6° / 19.2°

Aug

6229.6° / 17.6°

Sep

7825.2° / 12.6°

Oct

5518.3° / 6°

Nov

2510.7° / -0.5°

Dec

54° / -6°

Monthly climate evidence for Carlow — daylight is calculated from latitude, everything else is measured
Month	Day	Night	Rain	Wet days	Daylight	Comfort	Coverage
January	1.8°C	-8.6°C	32 mm	3.7	9 h 38	5	Strong coverage
February	5°C	-6.5°C	48 mm	3.9	10 h 37	5	Strong coverage
March	11.2°C	-1°C	65 mm	6.1	11 h 49	22	Strong coverage
April	17.5°C	4.9°C	91 mm	8.1	13 h 12	48	Strong coverage
May	23°C	11.1°C	138 mm	9.1	14 h 21	70	Strong coverage
June	28.3°C	16.8°C	143 mm	8.4	14 h 59	63	Strong coverage
July	30.6°C	19.2°C	118 mm	8.4	14 h 44	54	Strong coverage
August	29.6°C	17.6°C	112 mm	7.2	13 h 44	62	Strong coverage
September	25.2°C	12.6°C	111 mm	6.5	12 h 24	78	Strong coverage
October	18.3°C	6°C	83 mm	6.5	11 h 05	55	Strong coverage
November	10.7°C	-0.5°C	49 mm	4.3	9 h 55	25	Strong coverage
December	4°C	-6°C	43 mm	4.2	9 h 21	5	Strong coverage

Records at GALLATIN 1W, 1963–2023
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	21.7°C29 Jan 2013	-26.7°C2 Jan 2018	61 mm29 Jan 2000	114 mm2001 · driest 0 mm in 1991	36
February	24.4°C23 Feb 2017	-27.8°C4 Feb 1996	79 mm8 Feb 2001	263 mm2001 · driest 0 mm in 1981	36
March	30.0°C27 Mar 1991	-24.4°C12 Mar 1998	51 mm5 Mar 2004	134 mm2004 · driest 0 mm in 1994	38
April	32.8°C27 Apr 1989	-11.7°C3 Apr 2018	104 mm10 Apr 1997	201 mm1993 · driest 12 mm in 1989	38
May	36.7°C28 May 2018	-1.1°C6 May 1992	173 mm7 May 2007	308 mm1995 · driest 15 mm in 2006	38
June	37.2°C16 Jun 2016	5.6°C10 Jun 1966	173 mm25 Jun 2008	359 mm2008 · driest 48 mm in 1992	39
July	40.6°C26 Jul 2012	10.6°C5 Jul 1997	129 mm22 Jul 1993	449 mm1993 · driest 7 mm in 2017	37
August	41.1°C19 Aug 2003	6.7°C13 Aug 1964	115 mm24 Aug 2007	300 mm2009 · driest 24 mm in 1991	35
September	36.7°C2 Sep 2000	0.0°C24 Sep 1989	108 mm13 Sep 2008	387 mm1993 · driest 17 mm in 2023	35
October	34.4°C6 Oct 1963	-6.1°C30 Oct 1993	96 mm8 Oct 2018	240 mm2018 · driest 0 mm in 1964	33
November	27.2°C15 Nov 1964	-20.0°C8 Nov 1991	62 mm5 Nov 2022	164 mm2015 · driest 0 mm in 1989	35
December	22.2°C16 Dec 2021	-30.6°C23 Dec 1989	54 mm11 Dec 2007	133 mm1992 · driest 0 mm in 1989	36

Typical days per month at GALLATIN 1W, 1991–2020
Month	Days 25°C+	Days 30°C+	Frost nights	Heavy rain (10 mm+)	Snow days
January	0	0	27	1	3
February	0	0	23	1	2
March	1	<1	17	2	<1
April	4	<1	6	3	<1
May	13	3	<1	4	0
June	23	11	0	4	0
July	27	17	0	4	0
August	26	14	0	3	0
September	16	6	0	3	0
October	5	<1	4	3	<1
November	<1	0	16	2	<1
December	0	0	26	1	2

How often, not how much — every day in GALLATIN 1W’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%	14%	4%	8%	-0.6–5.9°C
February	2%	15%	4%	11%	-0.4–8.7°C
March	13%	20%	7%	19%	7.3–14.6°C
April	30%	26%	11%	30%	14.6–20.3°C
May	53%	29%	13%	34%	21.0–25.8°C
June	70%	30%	15%	33%	26.9–30.2°C
July	73%	23%	11%	19%	28.4–33.0°C
August	75%	23%	11%	22%	27.8–31.5°C
September	71%	22%	12%	20%	22.8–27.8°C
October	38%	19%	8%	16%	16.0–21.2°C
November	13%	15%	6%	10%	6.1–15.4°C
December	<1%	14%	4%	10%	0.8–6.9°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.

1964Each stripe is one year’s mean temperature against the 26-year average. Warmest: 2012. Coolest: 1996.2022

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 4380054
NOAA station: USC00233102 · GALLATIN 1W
Station distance: 12.1 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 25 usable years
Daylight: Calculated from latitude 39.88°, 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 GALLATIN 1W is what differs

Gallatin→Jamesport→Winston→Altamont→Jameson→Blake→

Or put two places side by side: Carlow vs Gallatin

Best time to visitCarlow.