Unalaska climate

Unalaska Weather in May

NOAA 1991-2020 normals for Dutch Harbor, 2.4 km from Unalaska

Average highs run from 44°F on May 1 to 49°F on May 31, and lows from 35°F to 40°F. Normal precipitation for the month is 4.20 in over about 18 wet days.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Unalaska, in °F, with the record for each date.020406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
47°F
Average low
37°F
Precipitation
4.20 in
Snowfall
0.2 in
Record high
66°FMay 27, 1927
Record low
15°FMay 2, 1984
Chance of a freeze
73%
Daylight
15 h 09 min to 16 h 44 min
Cloud cover
91%
Humidity
88%
Dew point
36°F
Wind
13.6 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
May 144°F35°F54°F 192026°F 192458%5%
May 245°F35°F57°F 198915°F 198458%5%
May 345°F35°F58°F 191520°F 199458%4%
May 445°F36°F58°F 192324°F 198658%4%
May 545°F36°F58°F 193525°F 201258%4%
May 645°F36°F57°F 200418°F 198458%3%
May 745°F36°F64°F 192927°F 191658%3%
May 845°F36°F58°F 199624°F 191758%3%
May 946°F36°F58°F 192419°F 198458%3%
May 1046°F37°F57°F 192620°F 192858%2%
May 1146°F37°F59°F 199628°F 191658%2%
May 1246°F37°F55°F 193628°F 201258%2%
May 1346°F37°F55°F 193328°F 191658%2%
May 1446°F37°F59°F 192427°F 198958%1%
May 1547°F37°F57°F 192424°F 198958%1%
May 1647°F37°F59°F 191825°F 198958%1%
May 1747°F38°F57°F 191824°F 198457%1%
May 1847°F38°F58°F 191830°F 191657%1%
May 1947°F38°F58°F 192930°F 191657%1%
May 2047°F38°F57°F 193429°F 191657%1%
May 2147°F38°F56°F 193129°F 198257%1%
May 2248°F38°F56°F 194032°F 193457%1%
May 2348°F38°F56°F 201630°F 192657%0%
May 2448°F39°F57°F 193032°F 199057%0%
May 2548°F39°F56°F 199231°F 193957%0%
May 2648°F39°F56°F 200622°F 198456%0%
May 2749°F39°F66°F 192732°F 193056%0%
May 2849°F39°F60°F 200630°F 193356%0%
May 2949°F39°F61°F 193331°F 192756%0%
May 3049°F40°F60°F 193332°F 192855%0%
May 3149°F40°F58°F 200630°F 192755%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Unalaska, in percent, and of at least 0.1 inch of snowfall.02040601102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (AKDT).

May 1
sunrise 7:29 AM, sunset 10:38 PM
May 31
sunrise 6:42 AM, sunset 11:26 PM

Every day of May: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00502587 (Dutch Harbor), public domain. Records: NOAA GHCN-Daily, station USC00502587, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.