Letterkenny climate

Letterkenny Weather in August

NASA POWER reanalysis for the half-degree grid cell around Letterkenny, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from 17°C on August 1 to 16°C on August 31, and lows from 12°C to 11°C. Normal precipitation for the month is 115 mm over about 22 wet days.

August day by day

The normal high and low for each date, in °C.

Normal daily high and low temperature at Letterkenny, in °C, with the record for each date.510152025151015202530
  • Normal low
  • Normal high
  • Reanalysis extreme high
  • Reanalysis extreme low

August at a glance

Average high
17°C
Average low
11°C
Precipitation
115 mm
Reanalysis high
24°CAug 5, 2003
Reanalysis low
7°CAug 24, 2014
Daylight
15 h 53 min to 13 h 51 min
Cloud cover
80%
Humidity
87%
Dew point
12°C
Wind
19.1 km/h

Every day of the month

A wet day has at least 1 mm of precipitation in the reanalysis.

DateNormal highNormal lowReanalysis highReanalysis lowChance wet
Aug 117°C12°C23°C 19958°C 201574%
Aug 217°C12°C22°C 19959°C 201574%
Aug 317°C12°C21°C 19959°C 201174%
Aug 417°C12°C22°C 20039°C 201774%
Aug 517°C12°C24°C 20038°C 201773%
Aug 617°C12°C21°C 20039°C 199673%
Aug 717°C12°C22°C 20038°C 201572%
Aug 817°C12°C24°C 20039°C 199271%
Aug 917°C12°C21°C 200310°C 199571%
Aug 1017°C12°C22°C 19959°C 201872%
Aug 1117°C12°C22°C 19977°C 201871%
Aug 1217°C12°C21°C 19977°C 199372%
Aug 1317°C12°C22°C 20208°C 199372%
Aug 1417°C12°C21°C 19978°C 199372%
Aug 1517°C12°C21°C 20208°C 199372%
Aug 1617°C12°C21°C 19958°C 199373%
Aug 1717°C11°C24°C 19958°C 199373%
Aug 1817°C11°C24°C 19959°C 199273%
Aug 1917°C11°C24°C 19958°C 201172%
Aug 2017°C11°C23°C 19958°C 201472%
Aug 2116°C11°C22°C 19957°C 199972%
Aug 2216°C11°C20°C 19917°C 199972%
Aug 2316°C11°C21°C 20038°C 199372%
Aug 2416°C11°C21°C 20037°C 201470%
Aug 2516°C11°C20°C 20198°C 201570%
Aug 2616°C11°C18°C 19918°C 199869%
Aug 2716°C11°C18°C 20178°C 199868%
Aug 2816°C11°C21°C 19919°C 200168%
Aug 2916°C11°C21°C 19918°C 199267%
Aug 3016°C11°C22°C 19918°C 201067%
Aug 3116°C11°C21°C 19938°C 201065%

Chance of rain

The chance of at least 1 mm of precipitation in the reanalysis on each date at Letterkenny, in percent.0204060801102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+1).

August 1
sunrise 5:40 AM, sunset 9:33 PM
August 31
sunrise 6:35 AM, sunset 8:26 PM

Every day of August: sun and moon

Other months

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.