Climate averages 1991–2020

Anchorage weather
in April.

A cold, fairly dry month: the 6th warmest and the driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 4.7°C Daytime mean, April

Average low -1.8°C Night-time mean, April

Rainfall 29 mm 7 days with ≥1 mm

Daylight 15 h Sunrise to sunset, per day

April is a cold month in Anchorage: daytime highs average 4.7°C and nights cool to about -1.8°C. By daytime temperature it is the 6th warmest of the 12 months.

Expect about 29 mm of rain on roughly 7 days, which makes April a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 39 min on an average April day.

Among the 498 cities listed in the United States, Anchorage ranks 498th of 498 for the warmest April highs and joint 84th of 498 for the driest April (rainfall, lowest first). The mean April high of those 498 cities is 19.4°C; Anchorage is 14.7°C cooler than that mean.

From April to May, average highs rise by 5.4°C to 10.1°C, and monthly rainfall rises from 29 mm to 30 mm.

The annual picture

April in context

30-year average

Average highAverage low°C

Monthly precipitation

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Anchorage climate table

1991–2020

Monthly climate averages for Anchorage, 1991–2020
Month	Average highHigh / low	Average low	Precipitation mm/month	Wet days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	-6.8°C-10.9°C	-10.9°C	50	10.4	6.56 h
February	-3.9°C-8.5°C	-8.5°C	50	9.7	8.99 h
March	-1.2°C-7.2°C	-7.2°C	38	8.5	11.712 h
April, selected	4.7°C-1.8°C	-1.8°C	29	7.3	14.715 h
May	10.1°C2.9°C	2.9°C	30	7.1	17.417 h
June	15.4°C9.0°C	9.0°C	40	8.9	19.219 h
July	17.3°C11.9°C	11.9°C	73	12.5	18.418 h
August	16.3°C11.0°C	11.0°C	107	14.8	15.916 h
September	11.8°C6.7°C	6.7°C	117	15.3	13.013 h
October	4.4°C-0.2°C	-0.2°C	90	13.2	10.110 h
November	-2.6°C-6.8°C	-6.8°C	66	11.7	7.47 h
December	-5.1°C-9.4°C	-9.4°C	73	12.9	5.66 h

Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Anchorage) is explained once on the Anchorage year overview and on the Sources, method and limits page.