How many sunny days does Letterkenny have per year?

Letterkenny averages approximately 83 sunny days per year, based on historical climate data.

What is the air quality in Letterkenny?

Letterkenny has an annual PM2.5 concentration of 5.9 µg/m³, classified as "Good" by WHO standards. Within WHO interim target 4. Low health risk for most people.

Ulster

Letterkenny · Ireland

A city in Ireland.

Small city

19K

05:04 UTC+0

EUR

Explore on map →Climate twin →

Letterkenny, Ireland is a 19K-resident city with 83 sunny days and 6 frost days annually and an annual PM2.5 of 5.9 µg/m³. A city in Ireland.

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Climate

Feels-like °C

-5

-6

-1

-5

Dinner outside

Climate Lab·Letterkenny

Monthly climate metrics across temperature, precipitation, wind, and UV.

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Metric	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
Temperature
Daily high°C	9	10	11	14	15	17	18	18	18	14	12	11	14
Daily mean°C	7	6	7	10	12	14	15	15	14	12	9	6	10
Daily low°C	2	3	4	6	8	11	13	13	11	8	6	3	7
Thermal comfort
High feelsDaily high feels-like°C	3	4	8	14	17	19	21	23	19	11	7	3	12
Mean feelsDaily mean feels-like°C	-5	-6	-1	5	9	11	13	14	10	4	-1	-5	4
Low feelsDaily low feels-like°C	-12	-16	-10	-5	0	3	6	6	1	-3	-8	-13	-4
Humidity
HumidityRelative humidity%	86	83	82	77	77	77	82	84	81	86	88	89	83
Dewpoint°C	3.6	3.5	4.0	4.7	7.0	9.8	11.6	12.4	10.7	9.0	6.3	4.5	7.3
Precipitation
Rainfallmm	110	106	102	109	76	92	94	124	86	160	119	140	1316
Rain days≥1mm	18	23	19	19	17	17	22	19	16	23	19	20	232
Snowfallmm	0	2	0	0	0	0	0	0	0	0	0	0	3
Snow days≥1mm	0	1	0	0	0	0	0	0	0	0	0	0	1
Wind
Wind avgm/s	5.2	6.0	4.8	4.3	3.8	4.2	4.1	3.5	3.9	5.0	4.6	5.6	4.6
Wind gustsm/s	9.6	9.9	8.7	7.7	8.3	7.5	7.2	7.7	7.7	8.2	8.6	10.1	8.4
Sun & UV
Sunshinehrs/day	3.0	4.0	5.7	8.7	9.7	8.7	8.0	9.5	6.3	4.6	2.3	1.0	6.0
Clear skyindex	20%	21%	24%	34%	23%	20%	19%	25%	20%	21%	15%	13%	21%
UV indexmax avg	0.3	0.6	1.1	2.3	3.2	3.8	3.3	3.0	2.2	0.9	0.4	0.2	1.8

Based on 2014–2024 hourly climate data · Updated Mar 2025

Confidence: High

Lifestyle Calendar·Letterkenny

Letterkenny offers a solid outdoor season. Lunch outside is tough year-round, while walking is comfortable 12/12 months — impressive.

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Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual

0/12

Dinner Outside

0Jan: 0% viability

0Feb: 0% viability

3Mar: 3% viability

17Apr: 17% viability

34May: 34% viability

48Jun: 48% viability

51Jul: 51% viability

51Aug: 51% viability

39Sep: 39% viability

7Oct: 7% viability

1Nov: 1% viability

0Dec: 0% viability

0/12

Dinner Outside

0Jan: 0% viability

0Feb: 0% viability

3Mar: 3% viability

17Apr: 17% viability

34May: 34% viability

48Jun: 48% viability

51Jul: 51% viability

51Aug: 51% viability

39Sep: 39% viability

7Oct: 7% viability

1Nov: 1% viability

0Dec: 0% viability

21%

Cold

0/12

Lunch Outside

7Jan: 7% viability

8Feb: 8% viability

28Mar: 28% viability

51Apr: 51% viability

53May: 53% viability

60Jun: 60% viability

58Jul: 58% viability

57Aug: 57% viability

61Sep: 61% viability

43Oct: 43% viability

28Nov: 28% viability

7Dec: 7% viability

0/12

Lunch Outside

7Jan: 7% viability

8Feb: 8% viability

28Mar: 28% viability

51Apr: 51% viability

53May: 53% viability

60Jun: 60% viability

58Jul: 58% viability

57Aug: 57% viability

61Sep: 61% viability

43Oct: 43% viability

28Nov: 28% viability

7Dec: 7% viability

38%

Cold

12/12

Walking

82Jan: 82% viability

70Feb: 70% viability

88Mar: 88% viability

93Apr: 93% viability

92May: 92% viability

94Jun: 94% viability

93Jul: 93% viability

91Aug: 91% viability

94Sep: 94% viability

92Oct: 92% viability

90Nov: 90% viability

82Dec: 82% viability

12/12

Walking

82Jan: 82% viability

70Feb: 70% viability

88Mar: 88% viability

93Apr: 93% viability

92May: 92% viability

94Jun: 94% viability

93Jul: 93% viability

91Aug: 91% viability

94Sep: 94% viability

92Oct: 92% viability

90Nov: 90% viability

82Dec: 82% viability

88%

12/12

Running

82Jan: 82% viability

70Feb: 70% viability

88Mar: 88% viability

93Apr: 93% viability

92May: 92% viability

94Jun: 94% viability

93Jul: 93% viability

91Aug: 91% viability

94Sep: 94% viability

92Oct: 92% viability

90Nov: 90% viability

82Dec: 82% viability

12/12

Running

82Jan: 82% viability

70Feb: 70% viability

88Mar: 88% viability

93Apr: 93% viability

92May: 92% viability

94Jun: 94% viability

93Jul: 93% viability

91Aug: 91% viability

94Sep: 94% viability

92Oct: 92% viability

90Nov: 90% viability

82Dec: 82% viability

88%

Tap any month for details · Click activity name for overview

ComfortableModerateUncomfortable

Based on 2014–2024 hourly climate data · Updated Mar 2025

Confidence: High

Letterkenny · Ireland

Climate

Climate Lab·Letterkenny

Lifestyle Calendar·Letterkenny

Air Quality Profile

Air Quality Profile

Who thrives in Letterkenny

Frequently asked about Letterkenny

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