Cloudiness

Cloudiness Normals 1971-2000

Cloud cover is expressed as fractions of the sky covered in clouds:

Clear sky conditions: zero to 3/10 average cloud coverage.

Partly cloudy: 4/10 - 7/10 cloud coverage.

Cloudy: 8/10 - 10/10 cloud coverage.

View tabular data for selected stations for the period 1971-2000 below.

Mean cloudiness, sky cover % (1971 - 2000)

LOCATION	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANNUAL
Adak	88	88	89	91	92	93	94	92	89	87	86	86	90
Anchorage	73	68	68	72	77	78	79	78	79	78	74	79	75
Annette	80	78	79	78	75	78	77	75	76	82	83	84	79
Barrow	46	53	48	55	82	81	77	89	93	87	66	50	69
Barter Island	56	57	46	57	79	75	75	85	85	83	66	55	68
Bethel	66	56	60	66	76	81	84	87	84	77	71	73	73
Bettles	54	50	49	57	60	65	69	75	74	72	61	62	62
Big Delta	61	59	56	62	69	72	73	76	75	79	67	66	68
Cold Bay	83	84	82	89	90	92	94	94	90	87	85	85	88
Fairbanks	65	57	57	63	67	71	73	77	76	79	69	70	69
Gulkana	71	66	62	66	73	74	76	74	75	77	76	76	72
Homer	71	67	66	71	74	75	75	73	76	73	69	78	72
Juneau	78	78	78	77	78	82	83	79	84	88	87	84	81
King Salmon	69	64	67	74	80	84	86	86	83	74	73	75	76
Kodiak	74	69	68	76	79	81	80	75	75	68	67	74	74
Kotzebue	54	47	46	51	60	61	68	73	71	66	61	59	60
McGrath	64	48	56	63	71	74	78	82	79	78	72	72	70
Nome	58	51	53	57	66	65	74	78	76	68	64	65	65
St Paul	85	81	80	84	92	93	95	95	88	86	85	88	88
Talkeetna	70	62	63	68	74	75	78	78	77	72	68	76	72
Unalakleet	57	51	53	63	73	71	84	82	80	73	67	66	68
Valdez	74	72	70	74	76	80	83	78	80	78	74	81	77
Yakutat	80	76	76	79	82	85	86	83	82	83	81	84	81

Clear and cloudy days (1971 - 2000)

Asterisk (*) indicates less than 1 day. Dashes (--) denote sun below horizon.

LOCATION	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANNUAL
Number of clear days
Anchorage	7	7	8	6	4	3	3	3	4	5	6	6	61
Annette	4	3	4	4	4	3	3	4	4	2	3	3	40
Barrow	--	12	14	11	3	3	4	1	1	2	--	--
Bethel	8	10	9	6	4	2	2	1	2	4	6	8	62
Bettles	15	10	9	7	7	4	2	2	7	5	9	9	86
Cold Bay	2	2	2	1	1	*	*	*	*	1	1	2	12
Fairbanks	9	8	10	7	4	3	3	3	4	4	7	7	69
Gulkana	15	6	9	5	3	2	4	3	6	3	5	7	67
Homer	8	7	6	5	4	4	3	5	5	5	6	7	65
Juneau	5	4	4	4	4	3	3	4	3	2	3	3	43
King Salmon	8	7	7	4	3	1	1	1	2	4	6	6	50
Kodiak	5	6	6	4	3	3	3	4	4	6	7	6	59
Kotzebue	11	12	12	10	8	6	4	3	6	8	9	11	100
McGrath	9	9	9	7	4	2	2	2	4	4	6	8	66
Nome	10	12	11	9	7	6	4	3	5	7	8	10	91
St Paul Island	2	3	3	2	1	1	1	1	1	1	1	2	18
Talkeetna	6	8	9	5	6	1	5	3	5	6	8	5	67
Valdez	5	7	7	6	4	3	3	4	4	5	6	5	59
Yakutat	5	4	4	4	2	2	2	3	3	3	4	4	40

Number of partly cloudy days
Anchorage	5	3	5	6	7	7	6	7	5	5	4	4	65
Annette	4	4	4	5	6	6	7	6	5	4	3	4	60
Barrow	--	5	7	7	5	6	6	4	3	4	--	--
Bethel	5	4	6	7	7	7	5	4	5	5	5	5	64
Bettles	5	4	6	10	11	13	10	8	7	5	7	7	92
Cold Bay	6	4	6	3	3	3	3	2	4	5	6	5	49
Fairbanks	6	6	7	7	12	10	9	7	6	5	5	6	86
Homer	4	4	6	7	7	8	9	8	7	5	5	6	75
Juneau	3	3	4	4	4	5	5	5	3	2	3	3	42
King Salmon	5	5	6	6	6	5	5	5	6	7	5	6	70
Kodiak	6	4	7	7	6	6	6	7	7	8	7	6	74
Kotzebue	4	3	6	7	9	10	8	7	5	4	4	4	72
McGrath	5	4	7	8	8	9	8	6	4	5	5	4	73
Nome	4	3	6	7	8	9	7	6	5	6	4	4	69
St Paul Island	6	5	7	6	4	3	2	2	5	7	7	5	60
Talkeetna	4	4	4	7	6	12	7	11	6	5	3	4	73
Valdez	4	1	5	5	6	6	5	6	4	3	4	2	52
Yakutat	4	3	5	5	5	4	4	4	3	3	3	3	47

Number of cloudy days
Anchorage	19	18	18	18	20	20	22	21	21	21	20	21	239
Annette	23	21	23	21	21	21	21	21	21	25	24	24	265
Barrow	--	11	10	12	23	21	21	26	26	25	--	--
Bethel	18	14	16	17	20	21	24	26	23	22	19	18	239
Bettles	11	14	16	13	13	13	19	21	16	21	14	15	187
Cold Bay	23	22	23	26	27	27	28	29	26	25	23	24	304
Fairbanks	16	14	14	16	15	17	19	21	20	22	18	18	210
Homer	19	17	19	18	20	18	19	18	18	21	19	18	225
Juneau	23	21	23	22	23	22	23	22	24	27	24	25	280
King Salmon	18	16	18	20	22	24	25	25	22	20	19	19	245
Kodiak	20	18	18	19	22	21	22	20	19	17	16	19	232
Kotzebue	16	13	13	13	14	14	19	21	19	19	17	16	193
McGrath	17	15	15	15	19	19	21	23	22	22	19	19	226
Nome	17	13	14	14	16	15	20	22	20	18	18	17	205
St Paul Island	23	20	21	22	26	26	28	28	24	23	22	24	287
Talkeetna	21	16	18	18	19	17	19	17	19	20	19	22	225
Valdez	22	20	19	19	21	21	23	21	22	23	20	24	254
Yakutat	22	21	22	21	24	24	25	24	24	25	23	24	278

Mean number of foggy days (1971 - 2000)

Asterisk (*) indicates less than 1 day.

LOCATION	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANNUAL
Anchorage	6	4	2	1	*	*	*	1	1	2	4	5	26
Annette	1	1	1	*	1	1	2	2	3	1	1	*	15
Barrow	2	1	1	3	7	10	12	12	5	3	2	1	61
Bethel	4	3	4	4	5	3	4	6	5	4	4	5	50
Bettles	1	*	*	*	*	*	1	1	1	1	*	*	6
Big Delta	2	*	*	*	*	0	*	1	2	1	1	1	9
Cold Bay	2	1	2	1	2	2	4	3	1	*	1	2	21
Fairbanks	4	2	1	*	*	*	1	2	1	2	1	3	18
Gulkana	*	1	1	*	*	0	1	2	3	4	3	2	18
Homer	1	1	1	*	*	*	1	2	1	*	*	1	8
Juneau	2	2	2	1	1	*	*	1	3	3	3	2	21
King Salmon	3	1	2	2	2	3	5	4	3	3	3	3	33
Kodiak	1	1	1	*	1	2	3	3	1	*	*	1	14
Kotzebue	1	1	1	2	4	5	2	1	1	1	*	1	19
McGrath	2	1	1	*	1	*	1	1	1	1	1	2	13
Nome	2	1	1	1	3	4	3	1	1	*	1	2	21
St Paul Island	2	3	3	3	7	10	13	10	4	1	1	1	58
Talkeetna	*	*	*	*	*	*	*	*	1	1	1	1	5
Valdez	1	1	1	*	*	*	3	5	3	1	1	1	17
Yakutat	2	3	2	2	2	3	4	5	4	1	1	2	29