Letterkenny weather in October
In October, Letterkenny sees average daytime highs of 13°C and overnight lows near 8°C, with 105 mm of rain across 17.1 wet days and about 10.2 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.
Highs ease over the month, from about 14°C in the first days to 11°C by the end. The sky is clear or mostly clear about 5% of the time in October, and the air most often feels dry.
Daylight stretches from about 11 h 18 min at the start of October to 9 h 06 min by month's end. Set against the rest of the year, October is Letterkenny's 4th-clearest and 6th-windiest month. For the whole year in context, see Letterkenny's year-round climate.
- Daytime high
- 13°
- 6th warmest
- Overnight low
- 8°
- 8th coldest
- Rainfall
- 105 mm
- 17.1 wet days
- Daylight
- 10 h 12 min
- 7:11 AM – 5:21 PM
- Cloud cover
- 79%
- 4th clearest
- Wind
- 17 km/h
- 6th windiest
- Solar energy
- 1.46 kWh/m²
- Travel score
- 2.8
- 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.
Temperature in October
Highs ease over the month, from about 14°C in the first days to 11°C by the end.
A typical October day in Letterkenny reaches about 13°C in the afternoon and slips back to 8°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 15°C. Set against its neighbours, October runs about 3°C cooler than September and about 3°C warmer than November.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 |
| Avg low (°C) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 14 | 9 |
| 2 | 14 | 9 |
| 3 | 14 | 9 |
| 4 | 14 | 9 |
| 5 | 14 | 9 |
| 6 | 14 | 9 |
| 7 | 14 | 9 |
| 8 | 13 | 9 |
| 9 | 13 | 8 |
| 10 | 13 | 8 |
| 11 | 13 | 8 |
| 12 | 13 | 8 |
| 13 | 13 | 8 |
| 14 | 13 | 8 |
| 15 | 13 | 8 |
| 16 | 13 | 8 |
| 17 | 12 | 8 |
| 18 | 12 | 8 |
| 19 | 12 | 8 |
| 20 | 12 | 7 |
| 21 | 12 | 7 |
| 22 | 12 | 7 |
| 23 | 12 | 7 |
| 24 | 12 | 7 |
| 25 | 12 | 7 |
| 26 | 11 | 7 |
| 27 | 11 | 7 |
| 28 | 11 | 7 |
| 29 | 11 | 7 |
| 30 | 11 | 7 |
| 31 | 11 | 7 |
How October really feels in Letterkenny
Once humidity and wind are folded in, October 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.
October 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 October compares with the rest of the year at a glance. October is the 6th-warmest and 4th-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 October
The sky is clear or mostly clear about 5% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 15% of October, with mostly cloudy or overcast conditions the remaining 80%.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 18 | 18 | 19 | 19 | 19 | 19 | 20 | 21 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 20 | 20 | 20 | 19 | 19 | 19 | 18 | 17 | 17 | 17 |
| Cloudier (%) | 82 | 82 | 81 | 81 | 81 | 81 | 80 | 79 | 79 | 79 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 80 | 80 | 80 | 81 | 81 | 81 | 82 | 83 | 83 | 83 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 18 | 82 |
| 2 | 18 | 82 |
| 3 | 19 | 81 |
| 4 | 19 | 81 |
| 5 | 19 | 81 |
| 6 | 19 | 81 |
| 7 | 20 | 80 |
| 8 | 21 | 79 |
| 9 | 21 | 79 |
| 10 | 21 | 79 |
| 11 | 22 | 78 |
| 12 | 22 | 78 |
| 13 | 22 | 78 |
| 14 | 22 | 78 |
| 15 | 22 | 78 |
| 16 | 22 | 78 |
| 17 | 22 | 78 |
| 18 | 22 | 78 |
| 19 | 22 | 78 |
| 20 | 22 | 78 |
| 21 | 22 | 78 |
| 22 | 20 | 80 |
| 23 | 20 | 80 |
| 24 | 20 | 80 |
| 25 | 19 | 81 |
| 26 | 19 | 81 |
| 27 | 19 | 81 |
| 28 | 18 | 82 |
| 29 | 17 | 83 |
| 30 | 17 | 83 |
| 31 | 17 | 83 |
Chance of precipitation in October
Letterkenny gets around 105 mm of rain over 17.1 wet days in October. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 55% and peaks near 61% on the wettest days. The odds climb toward the end of the month.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 52 | 52 | 52 | 53 | 52 | 52 | 52 | 52 | 51 | 51 | 51 | 51 | 52 | 52 | 52 | 52 | 53 | 54 | 54 | 55 | 56 | 57 | 58 | 58 | 59 | 59 | 60 | 60 | 60 | 61 | 61 |
| Rain chance (%) | |
|---|---|
| 1 | 52 |
| 2 | 52 |
| 3 | 52 |
| 4 | 53 |
| 5 | 52 |
| 6 | 52 |
| 7 | 52 |
| 8 | 52 |
| 9 | 51 |
| 10 | 51 |
| 11 | 51 |
| 12 | 51 |
| 13 | 52 |
| 14 | 52 |
| 15 | 52 |
| 16 | 52 |
| 17 | 53 |
| 18 | 54 |
| 19 | 54 |
| 20 | 55 |
| 21 | 56 |
| 22 | 57 |
| 23 | 58 |
| 24 | 58 |
| 25 | 59 |
| 26 | 59 |
| 27 | 60 |
| 28 | 60 |
| 29 | 60 |
| 30 | 61 |
| 31 | 61 |
Humidity in October
Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the dry band about 98% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 93 | 93 | 94 | 94 | 95 | 95 | 96 | 96 | 97 | 97 | 98 | 98 | 98 | 98 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 |
| Comfortable (%) | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 93 | 7 |
| 2 | 93 | 7 |
| 3 | 94 | 6 |
| 4 | 94 | 6 |
| 5 | 95 | 5 |
| 6 | 95 | 5 |
| 7 | 96 | 4 |
| 8 | 96 | 4 |
| 9 | 97 | 3 |
| 10 | 97 | 3 |
| 11 | 98 | 2 |
| 12 | 98 | 2 |
| 13 | 98 | 2 |
| 14 | 98 | 2 |
| 15 | 99 | 1 |
| 16 | 99 | 1 |
| 17 | 99 | 1 |
| 18 | 99 | 1 |
| 19 | 99 | 1 |
| 20 | 99 | 1 |
| 21 | 99 | 1 |
| 22 | 99 | 1 |
| 23 | 99 | 1 |
| 24 | 99 | 1 |
| 25 | 99 | 1 |
| 26 | 99 | 1 |
| 27 | 99 | 1 |
| 28 | 99 | 1 |
| 29 | 99 | 1 |
| 30 | 99 | 1 |
| 31 | 99 | 1 |
Wind in October
Winds average 17 km/h in October.
Across October, daily wind ranges from about 17 km/h on the calmest days to 18 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| 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 | 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 | 17 | light breeze |
| 11 | 17 | light breeze |
| 12 | 17 | light breeze |
| 13 | 17 | light breeze |
| 14 | 17 | light breeze |
| 15 | 17 | light breeze |
| 16 | 17 | light breeze |
| 17 | 17 | light breeze |
| 18 | 17 | light breeze |
| 19 | 17 | light breeze |
| 20 | 17 | light breeze |
| 21 | 17 | light breeze |
| 22 | 17 | light breeze |
| 23 | 18 | light breeze |
| 24 | 18 | light breeze |
| 25 | 18 | light breeze |
| 26 | 18 | light breeze |
| 27 | 18 | light breeze |
| 28 | 18 | light breeze |
| 29 | 18 | light breeze |
| 30 | 18 | light breeze |
| 31 | 18 | light breeze |
Sunrise & sunset in October
Daylight runs from about 11 h 18 min at the start of October to 9 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 132 minutes over October. Sunrise moves from 6:41 AM to 7:42 AM, and sunset from 5:59 PM to 4:47 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 11.3 | 11.2 | 11.1 | 11.1 | 11.0 | 10.9 | 10.8 | 10.8 | 10.7 | 10.6 | 10.5 | 10.5 | 10.4 | 10.3 | 10.2 | 10.2 | 10.1 | 10.0 | 9.9 | 9.9 | 9.8 | 9.7 | 9.6 | 9.6 | 9.5 | 9.4 | 9.4 | 9.3 | 9.2 | 9.1 | 9.1 |
| Sunrise (AM) | 6:41 | 6:43 | 6:45 | 6:47 | 6:49 | 6:51 | 6:53 | 6:55 | 6:57 | 6:59 | 7:01 | 7:03 | 7:05 | 7:07 | 7:09 | 7:11 | 7:13 | 7:15 | 7:17 | 7:19 | 7:21 | 7:23 | 7:26 | 7:28 | 7:30 | 7:32 | 7:34 | 7:36 | 7:38 | 7:40 | 7:42 |
| Sunset (PM) | 5:59 | 5:56 | 5:53 | 5:51 | 5:48 | 5:46 | 5:43 | 5:41 | 5:38 | 5:36 | 5:33 | 5:31 | 5:28 | 5:26 | 5:23 | 5:21 | 5:18 | 5:16 | 5:14 | 5:11 | 5:09 | 5:07 | 5:04 | 5:02 | 5:00 | 4:58 | 4:55 | 4:53 | 4:51 | 4:49 | 4:47 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.3 | 6:41 | 5:59 |
| 2 | 11.2 | 6:43 | 5:56 |
| 3 | 11.1 | 6:45 | 5:53 |
| 4 | 11.1 | 6:47 | 5:51 |
| 5 | 11.0 | 6:49 | 5:48 |
| 6 | 10.9 | 6:51 | 5:46 |
| 7 | 10.8 | 6:53 | 5:43 |
| 8 | 10.8 | 6:55 | 5:41 |
| 9 | 10.7 | 6:57 | 5:38 |
| 10 | 10.6 | 6:59 | 5:36 |
| 11 | 10.5 | 7:01 | 5:33 |
| 12 | 10.5 | 7:03 | 5:31 |
| 13 | 10.4 | 7:05 | 5:28 |
| 14 | 10.3 | 7:07 | 5:26 |
| 15 | 10.2 | 7:09 | 5:23 |
| 16 | 10.2 | 7:11 | 5:21 |
| 17 | 10.1 | 7:13 | 5:18 |
| 18 | 10.0 | 7:15 | 5:16 |
| 19 | 9.9 | 7:17 | 5:14 |
| 20 | 9.9 | 7:19 | 5:11 |
| 21 | 9.8 | 7:21 | 5:09 |
| 22 | 9.7 | 7:23 | 5:07 |
| 23 | 9.6 | 7:26 | 5:04 |
| 24 | 9.6 | 7:28 | 5:02 |
| 25 | 9.5 | 7:30 | 5:00 |
| 26 | 9.4 | 7:32 | 4:58 |
| 27 | 9.4 | 7:34 | 4:55 |
| 28 | 9.3 | 7:36 | 4:53 |
| 29 | 9.2 | 7:38 | 4:51 |
| 30 | 9.1 | 7:40 | 4:49 |
| 31 | 9.1 | 7:42 | 4:47 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 1.46 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 — October's 1.46 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 1.9 | 1.9 | 1.9 | 1.8 | 1.8 | 1.8 | 1.7 | 1.7 | 1.7 | 1.6 | 1.6 | 1.6 | 1.6 | 1.5 | 1.5 | 1.5 | 1.4 | 1.4 | 1.4 | 1.4 | 1.3 | 1.3 | 1.3 | 1.2 | 1.2 | 1.2 | 1.1 | 1.1 | 1.1 | 1.1 | 1.0 |
| Level | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 1.9 | Dim |
| 2 | 1.9 | Dim |
| 3 | 1.9 | Dim |
| 4 | 1.8 | Dim |
| 5 | 1.8 | Dim |
| 6 | 1.8 | Dim |
| 7 | 1.7 | Dim |
| 8 | 1.7 | Dim |
| 9 | 1.7 | Dim |
| 10 | 1.6 | Dim |
| 11 | 1.6 | Dim |
| 12 | 1.6 | Dim |
| 13 | 1.6 | Dim |
| 14 | 1.5 | Dim |
| 15 | 1.5 | Dim |
| 16 | 1.5 | Dim |
| 17 | 1.4 | Dim |
| 18 | 1.4 | Dim |
| 19 | 1.4 | Dim |
| 20 | 1.4 | Dim |
| 21 | 1.3 | Dim |
| 22 | 1.3 | Dim |
| 23 | 1.3 | Dim |
| 24 | 1.2 | Dim |
| 25 | 1.2 | Dim |
| 26 | 1.2 | Dim |
| 27 | 1.1 | Dim |
| 28 | 1.1 | Dim |
| 29 | 1.1 | Dim |
| 30 | 1.1 | Dim |
| 31 | 1.0 | Dim |
Is October a good time to visit Letterkenny?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October is a weaker month for outdoor sightseeing in Letterkenny.
What to pack for Letterkenny in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, Letterkenny sees daytime highs around 13°C and nights near 8°C. Pack rain gear. Worth having: a warm layer. About 17 days see rain.
Sea temperature near Letterkenny in October
The nearest coast averages about 13°C in October — 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 October
Clear-sky midday UV in October peaks around 2. 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 |
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.
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).