Ireland · 1991–2020

Best time to visit
Blackrock.

July leads for comfortable weather in Blackrock: typically 19.6°C by day, 11.8°C at night, with 68 mm of rain. Based on measured 1991–2020 NOAA station history.

Best comfortJuly

Typical high19.6°C

Typical low11.8°C

Rain in July68 mm

Comfort

July

July · August · June

67climate match

Beach

July

July · August · September

31climate match

Outdoors

July

July · August · September

79climate match

The weakest month is January, scoring 8 against July’s 67 — days reach only 7.9°C, 16° 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

87.9° / 2.1°

Feb

108.6° / 1.9°

Mar

1910.4° / 3.1°

Apr

3513° / 4.8°

May

4315.9° / 7.1°

Jun

5718.1° / 10°

Jul

6719.6° / 11.8°

Aug

6419.3° / 11.7°

Sep

5717.2° / 9.7°

Oct

3613.7° / 7°

Nov

1910.3° / 4.2°

Dec

88.2° / 2.1°

Monthly climate evidence for Blackrock — daylight is calculated from latitude, everything else is measured, sea temperature from the nearest open water 10 km away
Month	Day	Night	Rain	Wet days	Sea	Daylight	Comfort	Coverage
January	7.9°C	2.1°C	73 mm	13.9	8.8°C	7 h 55	8	Strong coverage
February	8.6°C	1.9°C	83 mm	12.9	7.8°C	9 h 40	10	Strong coverage
March	10.4°C	3.1°C	80 mm	12.9	7.6°C	11 h 39	19	Strong coverage
April	13°C	4.8°C	55 mm	11.3	8.8°C	13 h 56	35	Strong coverage
May	15.9°C	7.1°C	85 mm	12.4	10.9°C	15 h 56	43	Strong coverage
June	18.1°C	10°C	82 mm	12.2	13.4°C	17 h 06	57	Strong coverage
July	19.6°C	11.8°C	68 mm	12.2	14.9°C	16 h 38	67	Strong coverage
August	19.3°C	11.7°C	77 mm	12.9	15.1°C	14 h 51	64	Strong coverage
September	17.2°C	9.7°C	65 mm	11.1	14.4°C	12 h 37	57	Strong coverage
October	13.7°C	7°C	81 mm	12.6	13.1°C	10 h 25	36	Strong coverage
November	10.3°C	4.2°C	82 mm	14.2	11.6°C	8 h 26	19	Strong coverage
December	8.2°C	2.1°C	81 mm	14.1	10.2°C	7 h 25	8	Strong coverage

What has changed

Blackrock runs +1.2°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

+1.2

Feb

+1.9

Mar

+1.3

Apr

+1.4

May

+1.6

Jun

+0.9

Jul

+0.8

Aug

+0.6

Sep

+1.0

Oct

+0.9

Nov

+1.5

Dec

+1.4

July daytime highs, 2011–2025. Last recorded: 20.9°C.

Records at ARMAGH, 1844–2026
Month	Record high	Record low	Wettest day	Wettest / driest month	Years
January	15.7°C25 Jan 1847	-14.3°C6 Jan 1894	35 mm8 Jan 1854	171 mm1948 · driest 10 mm in 1855	183
February	17.0°C25 Feb 2019	-15.1°C7 Feb 1895	83 mm10 Feb 2009	532 mm2009 · driest 3 mm in 1932	183
March	21.8°C29 Mar 1965	-12.4°C3 Mar 1947	80 mm9 Mar 2009	510 mm2009 · driest 7 mm in 1953	183
April	23.1°C29 Apr 2025	-7.1°C11 Apr 1917	63 mm24 Apr 2009	296 mm2009 · driest 2 mm in 1938	183
May	26.3°C24 May 2026	-2.3°C7 May 1982	63 mm9 May 2009	800 mm2009 · driest 2 mm in 1844	183
June	30.4°C26 Jun 2018	0.0°C23 Jun 2021	61 mm17 Jun 2009	313 mm2009 · driest 4 mm in 1942	183
July	31.3°C21 Jul 2021	0.0°C8 Jul 1889	62 mm8 Jul 2009	366 mm2009 · driest 5 mm in 1878	182
August	29.4°C20 Aug 1995	2.0°C24 Aug 2014	78 mm15 Aug 1970	240 mm2009 · driest 10 mm in 1995	182
September	27.9°C7 Sep 2023	-0.6°C22 Sep 1932	48 mm3 Sep 2022	166 mm1962 · driest 3 mm in 1894	182
October	22.7°C3 Oct 1908	-5.6°C26 Oct 1892	55 mm5 Oct 1929	195 mm2023 · driest 21 mm in 1951	182
November	17.3°C10 Nov 2022	-8.3°C15 Nov 1919	77 mm21 Nov 1969	188 mm1852 · driest 12 mm in 1945	182
December	18.2°C9 Dec 1847	-14.6°C25 Dec 1878	41 mm17 Dec 1958	186 mm2015 · driest 16 mm in 1844	182

Typical days per month at ARMAGH, 1991–2020
Month	Days 25°C+	Frost nights	Heavy rain (10 mm+)
January	0	8	1
February	0	8	2
March	0	5	1
April	0	2	1
May	<1	<1	1
June	<1	0	2
July	2	0	2
August	<1	0	2
September	0	0	2
October	0	<1	2
November	0	4	2
December	0	7	2

How often, not how much — every day in ARMAGH’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%	45%	5%	62%	5.3–8.8°C
February	0%	41%	4%	54%	5.9–9.7°C
March	<1%	39%	4%	54%	7.7–11.6°C
April	<1%	37%	3%	50%	10.6–14.1°C
May	7%	38%	4%	50%	13.8–17.2°C
June	19%	38%	5%	53%	16.4–19.8°C
July	26%	40%	6%	57%	17.6–21.0°C
August	22%	44%	7%	59%	17.3–20.4°C
September	8%	40%	6%	55%	15.2–18.0°C
October	<1%	43%	7%	60%	11.7–14.7°C
November	0%	43%	6%	59%	8.0–11.1°C
December	0%	46%	6%	63%	5.4–9.4°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.

1844Each stripe is one year’s mean temperature against the 181-year average. Warmest: 2023. Coolest: 1879.2025

The evidence behind this page

Nearby, measured,
and named.

Place identity: GeoNames 2966130
NOAA station: UK000047811 · ARMAGH
Station distance: 46.8 km from the place centre
Climate period: 1991–2020
Minimum month coverage: 29 usable years
Daylight: Calculated from latitude 53.96°, mid-month, sunrise to sunset including refraction. Not a station measurement.
Sea temperature: NOAA OISST v2.1 1991–2020 monthly climatology, nearest open water 10 km from the place centre. A sheltered bay can run warmer than the open sea it is measured from.
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 ARMAGH is what differs

Craigavon→Dundalk→Portadown→Newry→Armagh→Dungannon→

Or put two places side by side: Blackrock vs Craigavon

Best time to visitBlackrock.

July

July

July

The whole year,without the guesswork.

Blackrock runs +1.2°Con the 1961–1990 baseline.

Nearby, measured,and named.

Best time to visit
Blackrock.

The whole year,
without the guesswork.

Blackrock runs +1.2°C
on the 1961–1990 baseline.

Nearby, measured,
and named.