Letterkenny weather in April

In April, Letterkenny sees average daytime highs of 11°C and overnight lows near 5°C, with 80 mm of precipitation across 16.1 wet days and about 13.8 hours of daylight. It is the 7th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 10°C in the first days to 12°C by the end. The sky is clear or mostly clear about 7% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of April to 14 h 48 min by month's end. Set against the rest of the year, April is Letterkenny's 2nd-clearest and 7th-windiest month. For the whole year in context, see Letterkenny's year-round climate.

Daytime high: 11°; 7th warmest
Overnight low: 5°; 5th coldest
Precipitation: 80 mm; 16.1 wet days
Daylight: 13 h 48 min; 5:37 AM – 7:25 PM
Cloud cover: 77%; 2nd clearest
Wind: 16 km/h; 7th windiest
Solar energy: 3.8 kWh/m²
Travel score: 2.3; out of 10

Letterkenny is town in County Donegal, Ireland.

Density: 472/km²; people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← March Letterkenny year-round climate May →Best places to visit in April

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 10°C in the first days to 12°C by the end.

A typical April day in Letterkenny reaches about 11°C in the afternoon and slips back to 5°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 15°C. Set against its neighbours, April runs about 2°C warmer than March and about 3°C cooler than May.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	10	10	10	10	10	10	11	11	11	11	11	11	11	11	11	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12
Avg low (°C)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	6	6

	Avg high (°C)	Avg low (°C)
1	10	5
2	10	5
3	10	5
4	10	5
5	10	5
6	10	5
7	11	5
8	11	5
9	11	5
10	11	5
11	11	5
12	11	5
13	11	5
14	11	5
15	11	5
16	11	5
17	11	5
18	11	5
19	12	5
20	12	5
21	12	6
22	12	6
23	12	6
24	12	6
25	12	6
26	12	6
27	12	6
28	12	6
29	12	6
30	12	6

How April really feels in Letterkenny

Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Letterkenny weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	7° / 3°	108	18.5	2	7.6	0.8
Feb	8° / 3°	91	15.9	1.8	9.3	1.0
Mar	9° / 4°	88	17	1.3	11.4	1.5
Apr	11° / 5°	80	16.1	0.3	13.8	2.3
May	14° / 7°	86	15.9	0	15.8	3.3
Jun	16° / 10°	92	16	0	17	3.9
Jul	17° / 12°	101	18	0	16.5	4.3
Aug	17° / 12°	105	17.8	0	14.7	4.3
Sep	15° / 10°	88	15.5	0	12.5	3.9
Oct	13° / 8°	105	17.1	0	10.2	2.8
Nov	10° / 6°	110	18.8	0.3	8.1	1.6
Dec	8° / 4°	113	18.1	1.2	7	0.9

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 15% of April, with mostly cloudy or overcast conditions the remaining 78%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	20	20	19	20	20	20	21	21	21	21	22	22	23	22	22	22	22	21	21	21	21	21	21	23	23	23	23	23	24	25
Cloudier (%)	80	80	81	80	80	80	79	79	79	79	78	78	77	78	78	78	78	79	79	79	79	79	79	77	77	77	77	77	76	75

	Clearer (%)	Cloudier (%)
1	20	80
2	20	80
3	19	81
4	20	80
5	20	80
6	20	80
7	21	79
8	21	79
9	21	79
10	21	79
11	22	78
12	22	78
13	23	77
14	22	78
15	22	78
16	22	78
17	22	78
18	21	79
19	21	79
20	21	79
21	21	79
22	21	79
23	21	79
24	23	77
25	23	77
26	23	77
27	23	77
28	23	77
29	24	76
30	25	75

Chance of precipitation in April

Any precipitationSnow

Letterkenny gets around 80 mm of rain and snow over 16.1 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 53% and peaks near 56% on the wettest days, and about 0 day brings snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	54	54	54	54	53	53	52	52	51	51	50	50	50	50	50	50	51	52	52	53	54	54	55	55	56	56	56	56	55	55
Snow chance (%)	3	3	2	2	2	2	2	2	2	1	1	1	1	1	1	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

	Rain chance (%)	Snow chance (%)
1	54	3
2	54	3
3	54	2
4	54	2
5	53	2
6	53	2
7	52	2
8	52	2
9	51	2
10	51	1
11	50	1
12	50	1
13	50	1
14	50	1
15	50	1
16	50	0
17	51	0
18	52	0
19	52	0
20	53	0
21	54	0
22	54	0
23	55	0
24	55	0
25	56	0
26	56	0
27	56	0
28	56	0
29	55	0
30	55	0

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in April

Winds average 16 km/h in April.

Across April, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	17	17	17	17	17	17	17	17	17	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	17	light breeze
2	17	light breeze
3	17	light breeze
4	17	light breeze
5	17	light breeze
6	17	light breeze
7	17	light breeze
8	17	light breeze
9	17	light breeze
10	16	light breeze
11	16	light breeze
12	16	light breeze
13	16	light breeze
14	16	light breeze
15	16	light breeze
16	16	light breeze
17	16	light breeze
18	16	light breeze
19	16	light breeze
20	16	light breeze
21	16	light breeze
22	16	light breeze
23	16	light breeze
24	16	light breeze
25	16	light breeze
26	16	light breeze
27	16	light breeze
28	16	light breeze
29	16	light breeze
30	16	light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 42 min at the start of April to 14 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 126 minutes over April. Sunrise moves from 6:15 AM to 5:04 AM, and sunset from 6:56 PM to 7:53 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.7	12.7	12.8	12.9	13.0	13.1	13.1	13.2	13.3	13.4	13.4	13.5	13.6	13.7	13.7	13.8	13.9	14.0	14.0	14.1	14.2	14.2	14.3	14.4	14.5	14.5	14.6	14.7	14.7	14.8
Sunrise (AM)	6:15	6:13	6:10	6:08	6:05	6:02	6:00	5:57	5:55	5:52	5:50	5:47	5:45	5:42	5:40	5:37	5:35	5:32	5:30	5:27	5:25	5:22	5:20	5:18	5:15	5:13	5:11	5:08	5:06	5:04
Sunset (PM)	6:56	6:58	7:00	7:02	7:04	7:06	7:08	7:09	7:11	7:13	7:15	7:17	7:19	7:21	7:23	7:25	7:27	7:29	7:31	7:33	7:35	7:37	7:39	7:41	7:43	7:45	7:47	7:49	7:51	7:53

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.7	6:15	6:56
2	12.7	6:13	6:58
3	12.8	6:10	7:00
4	12.9	6:08	7:02
5	13.0	6:05	7:04
6	13.1	6:02	7:06
7	13.1	6:00	7:08
8	13.2	5:57	7:09
9	13.3	5:55	7:11
10	13.4	5:52	7:13
11	13.4	5:50	7:15
12	13.5	5:47	7:17
13	13.6	5:45	7:19
14	13.7	5:42	7:21
15	13.7	5:40	7:23
16	13.8	5:37	7:25
17	13.9	5:35	7:27
18	14.0	5:32	7:29
19	14.0	5:30	7:31
20	14.1	5:27	7:33
21	14.2	5:25	7:35
22	14.2	5:22	7:37
23	14.3	5:20	7:39
24	14.4	5:18	7:41
25	14.5	5:15	7:43
26	14.5	5:13	7:45
27	14.6	5:11	7:47
28	14.7	5:08	7:49
29	14.7	5:06	7:51
30	14.8	5:04	7:53

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 3.8 kWh/m².

For context, solar energy here swings from a low near 0.42 kWh/m² to a high of 4.85 kWh/m² in May across the year — April's 3.8 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	3.1	3.1	3.2	3.3	3.3	3.4	3.4	3.5	3.5	3.5	3.6	3.6	3.7	3.7	3.8	3.8	3.9	3.9	4.0	4.0	4.0	4.1	4.1	4.2	4.2	4.3	4.3	4.3	4.4	4.4
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.1	Moderate
2	3.1	Moderate
3	3.2	Moderate
4	3.3	Moderate
5	3.3	Moderate
6	3.4	Moderate
7	3.4	Moderate
8	3.5	Moderate
9	3.5	Moderate
10	3.5	Moderate
11	3.6	Moderate
12	3.6	Moderate
13	3.7	Moderate
14	3.7	Moderate
15	3.8	Moderate
16	3.8	Moderate
17	3.9	Moderate
18	3.9	Moderate
19	4.0	Moderate
20	4.0	Bright
21	4.0	Bright
22	4.1	Bright
23	4.1	Bright
24	4.2	Bright
25	4.2	Bright
26	4.3	Bright
27	4.3	Bright
28	4.3	Bright
29	4.4	Bright
30	4.4	Bright

Planning a trip in April

Is April a good time to visit Letterkenny?

Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

2.3

Sightseeing

7th-best month of the year

—

Beach & pool

never really warm enough

April is a weaker month for outdoor sightseeing in Letterkenny.

What to pack for Letterkenny in April

From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In April, Letterkenny sees daytime highs around 11°C and nights near 5°C. Pack a warm layer and rain gear. About 16 days see rain.

a warm layerrain gear

Sea temperature near Letterkenny in April

The nearest coast averages about 9°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 45 km away) is warmest in August at about 15°C and coldest in February near 9°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	9	9	9	9	11	13	15	15	15	13	12	10
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Bracing	Bracing	Bracing	Bracing

	Sea temperature (°C)	Comfort
Jan	9	Bracing
Feb	9	Bracing
Mar	9	Bracing
Apr	9	Bracing
May	11	Bracing
Jun	13	Bracing
Jul	15	Bracing
Aug	15	Cool
Sep	15	Bracing
Oct	13	Bracing
Nov	12	Bracing
Dec	10	Bracing

UV index in Letterkenny in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Letterkenny peaks around May 24 at about 5 (high) — a little sun protection helps at midday. It bottoms out near January 1 at about 0 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 6 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	0	1	2	3	5	5	5	5	3	2	1	0
Level	Low	Low	Moderate	Moderate	High	High	High	Moderate	Moderate	Low	Low	Low

	UV index (midday)	Level
Jan	0	Low
Feb	1	Low
Mar	2	Moderate
Apr	3	Moderate
May	5	High
Jun	5	High
Jul	5	High
Aug	5	Moderate
Sep	3	Moderate
Oct	2	Low
Nov	1	Low
Dec	0	Low

Location & terrain

Where is Letterkenny?

Letterkenny sits at 55.0°N, 7.7°W, 8 m above sea level, in Ireland. The nearest listed city is Londonderry County Borough, 28 km away.

Topography around Letterkenny

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Letterkenny.

Within 3 km, the terrain around Letterkenny has only modest variations in elevation — a maximum elevation change of 199 m around an average of 73 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 452 m; within 80 km, large variations in elevation — a maximum elevation change of 706 m.

The land around Letterkenny is covered by grassland (60%) and trees (25%) within 3 km, grassland (72%) and trees (20%) within 16 km, and grassland (53%) and water (38%) within 80 km.

3 km

199 m

grassland 60%

16 km

452 m

grassland 72%

80 km

706 m

grassland 53%

treesgrasslandcroplandartificial surfaceswater

← March Letterkenny year-round climate May →Best places to visit in April

April weather nearby: Londonderry County Borough 28 km · Derry 28 km · Omagh 48 km · Coleraine 71 km · Sligo 89 km · Ballymena 94 km · Antrim 101 km · Portadown 101 km

Ireland travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type G; 230 V · 50 Hz
Prices: ≈ 85% of US; price level, 2025
GDP per capita: $131,592; 2025
Happiness: 6.9 / 10; World Happiness, 2025
Safe drinking water: 96%; of population, 2024
Homicide rate: 0.7; per 100k, 2023
Road deaths: 3.1; per 100k/yr, 2019
Income group: High; World Bank
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Letterkenny (54.95°, -7.7333°, elevation 8 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	10	5
2	10	5
3	10	5
4	10	5
5	10	5
6	10	5
7	11	5
8	11	5
9	11	5
10	11	5
11	11	5
12	11	5
13	11	5
14	11	5
15	11	5
16	11	5
17	11	5
18	11	5
19	12	5
20	12	5
21	12	6
22	12	6
23	12	6
24	12	6
25	12	6
26	12	6
27	12	6
28	12	6
29	12	6
30	12	6

	Clearer (%)	Cloudier (%)
1	20	80
2	20	80
3	19	81
4	20	80
5	20	80
6	20	80
7	21	79
8	21	79
9	21	79
10	21	79
11	22	78
12	22	78
13	23	77
14	22	78
15	22	78
16	22	78
17	22	78
18	21	79
19	21	79
20	21	79
21	21	79
22	21	79
23	21	79
24	23	77
25	23	77
26	23	77
27	23	77
28	23	77
29	24	76
30	25	75

	Rain chance (%)	Snow chance (%)
1	54	3
2	54	3
3	54	2
4	54	2
5	53	2
6	53	2
7	52	2
8	52	2
9	51	2
10	51	1
11	50	1
12	50	1
13	50	1
14	50	1
15	50	1
16	50	0
17	51	0
18	52	0
19	52	0
20	53	0
21	54	0
22	54	0
23	55	0
24	55	0
25	56	0
26	56	0
27	56	0
28	56	0
29	55	0
30	55	0

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	10	5
2	10	5
3	10	5
4	10	5
5	10	5
6	10	5
7	11	5
8	11	5
9	11	5
10	11	5
11	11	5
12	11	5
13	11	5
14	11	5
15	11	5
16	11	5
17	11	5
18	11	5
19	12	5
20	12	5
21	12	6
22	12	6
23	12	6
24	12	6
25	12	6
26	12	6
27	12	6
28	12	6
29	12	6
30	12	6

	Clearer (%)	Cloudier (%)
1	20	80
2	20	80
3	19	81
4	20	80
5	20	80
6	20	80
7	21	79
8	21	79
9	21	79
10	21	79
11	22	78
12	22	78
13	23	77
14	22	78
15	22	78
16	22	78
17	22	78
18	21	79
19	21	79
20	21	79
21	21	79
22	21	79
23	21	79
24	23	77
25	23	77
26	23	77
27	23	77
28	23	77
29	24	76
30	25	75

	Rain chance (%)	Snow chance (%)
1	54	3
2	54	3
3	54	2
4	54	2
5	53	2
6	53	2
7	52	2
8	52	2
9	51	2
10	51	1
11	50	1
12	50	1
13	50	1
14	50	1
15	50	1
16	50	0
17	51	0
18	52	0
19	52	0
20	53	0
21	54	0
22	54	0
23	55	0
24	55	0
25	56	0
26	56	0
27	56	0
28	56	0
29	55	0
30	55	0

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	10	5
2	10	5
3	10	5
4	10	5
5	10	5
6	10	5
7	11	5
8	11	5
9	11	5
10	11	5
11	11	5
12	11	5
13	11	5
14	11	5
15	11	5
16	11	5
17	11	5
18	11	5
19	12	5
20	12	5
21	12	6
22	12	6
23	12	6
24	12	6
25	12	6
26	12	6
27	12	6
28	12	6
29	12	6
30	12	6

	Clearer (%)	Cloudier (%)
1	20	80
2	20	80
3	19	81
4	20	80
5	20	80
6	20	80
7	21	79
8	21	79
9	21	79
10	21	79
11	22	78
12	22	78
13	23	77
14	22	78
15	22	78
16	22	78
17	22	78
18	21	79
19	21	79
20	21	79
21	21	79
22	21	79
23	21	79
24	23	77
25	23	77
26	23	77
27	23	77
28	23	77
29	24	76
30	25	75

	Rain chance (%)	Snow chance (%)
1	54	3
2	54	3
3	54	2
4	54	2
5	53	2
6	53	2
7	52	2
8	52	2
9	51	2
10	51	1
11	50	1
12	50	1
13	50	1
14	50	1
15	50	1
16	50	0
17	51	0
18	52	0
19	52	0
20	53	0
21	54	0
22	54	0
23	55	0
24	55	0
25	56	0
26	56	0
27	56	0
28	56	0
29	55	0
30	55	0

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100