Alaska Climate Data

We offer an Alaska Manual J for $79 in 4-6 hours.  We can also offer Alaska Manual S $79 and Alaska Manual D $99.

Below is a collection of Alaska Climate Data and outdoor design conditions. We included an Alaska state average of each category at the bottom of the Manual J climate data table. We created this to allow an easy to use free resource for Manual J professionals to use on jobsites, in the field, and while calculating Manual J heat loss and heat gain reports. If you have a custom set of data from Alaska we would consider adding to the Alaska Climate Data table simply email it to

We can also create a Manual J using climate data from the tables below. Email pdf plans, jobsite address, and square footage to and we will get your Alaska Manual J taken care of.

Free Manual J

AlaskaElevation in FeetLatitude North DegreesHeating 99% Outdoor Dry BulbCooling Outdoor Air 1% Dry BulbCooling Outdoor Air Coincident Wet BulbCooling Design Grains 55% Relative Humidity IndoorsCooling Design Grains 45% Relative Humidity IndoorsCooling Design Grains 45% Relative Humidity IndoorsDaily RatingHeating Design Days 65 degrees/Colling Design Days 50 degrees Ratio
Adak Naval Auxilary Air Station2052235753-19-13-6L90
Anaktuvuk Pass215668-356653-36-29-22M77
Anchorage international airport13161-46857-19-12-6L14
Anchorage, Merrill Field13861-77058-19-12-5L11
Anchorage, Elmendorf Air Force Base19461-97158-23-16-9L13
Anchorage, Fort Richardson34261–137158-20-14-7M13
Annette Island airport11255206959-13-60L8
Barrow, Willey Post-W Rogers airport1371-365350-25-18-12L1220
Barter Island (DEW Line)3970-405349-25-18-12L732
Bethel airport15161-226957-20-14-7L28
Bettles Field64367-447659-25-19-12M20
Big Delta, Allen Army Air Field, Ft127364-337557-31-24-17M16
Cape Lisburne Automated Weather Observation System1069-295651-22-16-9L409
Cape Newenham AFS52859-85954-19-12-5L67
Cape Romanzoff Automated Weather Observation System40462-116959-14-7-1L40
Cold Bay airport10255135753-17-11-4L67
Dillingham Municipal airport9559-146656-19-13-6L29
Dutch Harbor1354216155-15-8-2L44
Fairbanks international airport45365-387860-24-17-10M13
Fairbanks, Eielson Air Force Base54865-407860-21-14-8M14
Five Finger Island695722630-19-13-6L14
Fort Yukon45367-517759-26-19-13M16
Fort Richardson37761-137158-19-12-6M16
Gulkana Intermediate Field157862-337456-33-26-19M25
Homer airport726046356-17-10-4L24
Hooper Bay2062-136156-14-7-1L70
Iliamna airport16160-156756-21-14-7L22
Indian Mtn. AFS Automated Weather Observation System122066-357457-28-21-14M23
Juneau international airport235887058-18-11-4L13
Kake Seaplane Base057166656-21-14-7L15
Kenai Municipal airport9261-156656-21-15-8L25
Ketchikan international airport9555196859-12-51L8
King Salmon airport4959-186857-19-13-6M24
Kodiak airport11258136556-20-13-6L20
Memorial airport1667-316458-11-42L49
Lake Hood Seaplane Base13161-47159-18-11-5L11
McGrath airport33863-417559-22-15-9M18
McKinley Park171964-367255-33-26-19M35
Middleton Island AMOS12159236154-19-13-6L18
Nenana Municipal airport36165-447759-23-17-10M16
Nome Municipal airport2365-246556-21-14-8L56
Northway airport172263-467457-29-22-15M23
Palmer Municipal airport24962-97259-19-13-6M14
Point Hope Automated Weather Observation System1368-275551-22-15-8L382
Port Heiden9557-26254-24-17-11L42
Saint Mary`s Automated Weather Observation System31262-206656-22-15-9L42
Saint Paul Island airport305775351-21-14-8L483
Sand Point2355165952-23-16-10L38
Shemya Air Force Base10253245350-22-15-9L260
Shishmaref Automated Weather Observation System766-295752-23-16-10L189
Sitka, Japonski airport6657206458-10-43L11
Skagway airport435976957-22-16-9L11
Sparrevohn AFS158861-246956-27-20-13L27
Talkeetna State airport35862-197458-23-16-9M14
Tatalina LRRS98863-257357-26-19-13L17
Tin City AFS Automated Weather Observation System27266-245753-20-13-7L245
Togiac Village Automated Weather Observation System2059-146456-19-12-6L37
Unalakleet Field2064-276657-15-8-2L34
Valdez, Pioneer Field1256156655-26-20-13L27
Valdez WSO366176756-23-16-10L21
Yakutat State airport306066455-21-14-7L26
Alaska State Average304.405405405461.3783783784-12.054794520566.567567567655.3108108108-21.2297297297-14.5-7.9459459459M79.7972972973


Alaska Climate Data
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Alaska Climate Data
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