St. John's climate

St. John's Weather in August

NASA POWER reanalysis for the half-degree grid cell around St. John's, 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 13°C to 13°C. Normal precipitation for the month is 88 mm over about 14 wet days.

August day by day

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

Normal daily high and low temperature at St. John's, 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
14°C
Precipitation
88 mm
Reanalysis high
24°CAug 1, 2018
Reanalysis low
8°CAug 31, 2002
Daylight
14 h 57 min to 13 h 25 min
Cloud cover
72%
Humidity
88%
Dew point
14°C
Wind
18.7 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°C13°C24°C 201810°C 199245%
Aug 217°C13°C22°C 201310°C 199144%
Aug 317°C14°C22°C 199910°C 199145%
Aug 417°C14°C22°C 20129°C 199144%
Aug 517°C14°C20°C 20049°C 199143%
Aug 617°C14°C20°C 202010°C 199143%
Aug 718°C14°C22°C 199610°C 199144%
Aug 818°C14°C21°C 20128°C 199144%
Aug 918°C14°C21°C 19949°C 199143%
Aug 1018°C14°C22°C 20209°C 201143%
Aug 1118°C14°C21°C 199810°C 199344%
Aug 1218°C14°C21°C 200210°C 199345%
Aug 1318°C14°C22°C 200412°C 199346%
Aug 1418°C14°C22°C 201211°C 199545%
Aug 1518°C14°C21°C 200411°C 199545%
Aug 1618°C14°C21°C 200211°C 199345%
Aug 1718°C14°C21°C 202011°C 199344%
Aug 1818°C14°C21°C 200210°C 199544%
Aug 1917°C14°C20°C 201910°C 199544%
Aug 2017°C14°C20°C 200910°C 199745%
Aug 2117°C14°C21°C 201210°C 199746%
Aug 2217°C14°C22°C 201211°C 199346%
Aug 2317°C14°C20°C 201810°C 199247%
Aug 2417°C14°C20°C 20189°C 199149%
Aug 2517°C14°C21°C 20189°C 199149%
Aug 2617°C13°C21°C 20189°C 199247%
Aug 2717°C13°C22°C 20129°C 199246%
Aug 2817°C13°C21°C 201210°C 199547%
Aug 2917°C13°C20°C 201810°C 200947%
Aug 3017°C13°C19°C 201010°C 201447%
Aug 3116°C13°C20°C 20078°C 200247%

Chance of rain

The chance of at least 1 mm of precipitation in the reanalysis on each date at St. John's, in percent.010203040501102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT-2:30).

August 1
sunrise 5:38 AM, sunset 8:35 PM
August 31
sunrise 6:18 AM, sunset 7:43 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 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.