Weather in Alaska

Calculated from weather data of Juneau International Airport (PAJN) between 2020 and 2024.

Maximum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	34.0	32.0	38.0	33.0	37.0	30.0
February	35.0	35.0	34.0	39.0	31.0	37.0
March	40.0	43.0	37.0	41.0	38.0	39.0
April	49.0	51.0	48.0	47.0	49.0	48.0
May	58.0	55.0	58.0	60.0	54.0	62.0
June	64.0	66.0	63.0	69.0	65.0	60.0
July	66.0	62.0	70.0	65.0	67.0	65.0
August	65.0	67.0	67.0	64.0	64.0	59.0
September	58.0	55.0	56.0	58.0	56.0	58.0
October	48.0		49.0	51.0	46.0	46.0
November	39.0		42.0	37.0	40.0	36.0
December	36.0		40.0	29.0	27.0	40.0
Average	50.0	52.0	50.0	50.0	48.0	48.0

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°F)

Month	Average	2024	2023	2022	2021	2020
January	27.0	25	32	26	31	23
February	25.0	26	27	31	21	31
March	28.0	29	25	33	29	26
April	34.0	34	35	33	33	34
May	42.0	41	43	39	43	43
June	49.0	50	48	49	50	49
July	52.0	52	52	53	53	52
August	52.0	49	52	53	52	52
September	46.0	47	47	48	47	45
October	39.0		40	42	38	38
November	31.0		36	29	31	28
December	29.0		33	21	17	34
Average	38.0	39.0	39.0	39.0	37.0	38.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Cold and hot days

Number of days	2024	2023	2022	2021	2020
86 °F or warmer	0	0	0	0	0
77 °F or warmer	8	8	13	4	2
68 °F or warmer	26	42	40	31	17
32 °F or colder	66	79	81	110	104

Precipitation (%)

Month	Average	2024	2023	2022	2021	2020
January	40.0	48	49	46	47	38
February	37.9	37	46	56	39	62
March	32.3	25	25	47	49	32
April	30.1	22	40	20	42	39
May	29.9	37	28	21	47	13
June	27.0	20	27	21	34	42
July	28.2	44	12	42	23	32
August	30.4	21	23	38	36	49
September	35.4	41	51	37	54	26
October	38.2		42	48	41	29
November	40.6		51	41	48	36
December	41.9		58	40	29	44
Average	33.1	32.2	35.4	36.6	40.2	35.8

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (miles per hour)

Month	Average	2024	2023	2022	2021	2020
January	8.2	7	8	10	10	9
February	7.8	6	7	9	10	10
March	9.3	10	10	10	9	9
April	9.1	8	9	10	8	9
May	8.9	10	9	9	9	8
June	7.5	8	8	8	8	7
July	7.1	7	6	8	7	8
August	7.7	8	8	8	8	8
September	8.3	9	9	9	9	8
October	8.9		9	9	10	9
November	7.8		9	9	7	8
December	9.0		11	9	5	11
Average	8.3	8.2	8.5	8.9	8.3	8.5

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month	2024	2023	2022	2021	2020
January	E	E	E	E	E
February	E	E	E	E	E
March	SE	E	SE	E	E
April	SE	SE	SE	SE	SE
May	SE	SE	SE	SE	S
June	S	SE	S	SE	SE
July	E	SW	E	SE	E
August	SE	SE	E	E	E
September	E	E	E	E	E
October		E	E	SE	E
November		E	E	E	E
December		E	E	E	E

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.

Alaska weather Q&A

What is the warmest month in Alaska?

The warmest month is July with an average temperature of 66 °F over the past years.

What is the coldest month in Alaska?

The coldest month is January with an average daytime temperature of 34 °F in the past few years.

Which month is the wettest in Alaska?

Chance of precipitation is the highest in December with a probability of around 41.9 %.

Which month is the driest in Alaska?

The least rainfall and snow can be expected in June. The probability is about 27.1 %.