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Homer, Alaska climate
Dsc Mediterranean-influenced subarctic
Homer has a seasonal cold-temperate climate (Mediterranean-influenced subarctic, Köppen Dsc). The hottest month is July with an average daily high near 63°F, while the coldest is January averaging around 19°F at night. Precipitation totals about 24 inches a year and is strongly seasonal — September alone averages 3.3 inches while May barely receives 0.78 inches. At latitude 60°N, day length swings from 5.7 hours in midwinter to 18.3 hours at midsummer.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Homer climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 32 | 35 | 37 | 46 | 54 | 59 | 63 | 63 | 57 | 47 | 38 | 34 |
| Avg temp (°F) | 25 | 28 | 30 | 39 | 46 | 52 | 56 | 55 | 50 | 40 | 31 | 28 |
| Avg low (°F) | 19 | 22 | 23 | 31 | 38 | 45 | 49 | 48 | 42 | 33 | 25 | 21 |
| Precipitation (in) | 2.2 | 1.8 | 1.3 | 1.2 | 0.8 | 0.9 | 1.5 | 2.3 | 3.3 | 2.6 | 2.9 | 3.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 32 | 35 | 37 | 46 | 54 | 59 |
| Avg temp (°F) | 25 | 28 | 30 | 39 | 46 | 52 |
| Avg low (°F) | 19 | 22 | 23 | 31 | 38 | 45 |
| Precipitation (in) | 2.2 | 1.8 | 1.3 | 1.2 | 0.8 | 0.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 63 | 63 | 57 | 47 | 38 | 34 |
| Avg temp (°F) | 56 | 55 | 50 | 40 | 31 | 28 |
| Avg low (°F) | 49 | 48 | 42 | 33 | 25 | 21 |
| Precipitation (in) | 1.5 | 2.3 | 3.3 | 2.6 | 2.9 | 3.3 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 12 | 10 | 10 | 10 | 10 | 12 | 14 | 16 | 15 | 15 | 16 |
| Days with low ≤ 32°F (days) | 27 | 25 | 27 | 18 | 5 | — | — | — | 3 | 15 | 23 | 27 |
| Days with snowfall ≥ 1 in (days) | 0.9 | 0.9 | 0.9 | 0.1 | — | — | — | — | — | 0.2 | 0.6 | 0.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 12 | 10 | 10 | 10 | 10 |
| Days with low ≤ 32°F (days) | 27 | 25 | 27 | 18 | 5 | — |
| Days with snowfall ≥ 1 in (days) | 0.9 | 0.9 | 0.9 | 0.1 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 12 | 14 | 16 | 15 | 15 | 16 |
| Days with low ≤ 32°F (days) | — | — | 3 | 15 | 23 | 27 |
| Days with snowfall ≥ 1 in (days) | — | — | — | 0.2 | 0.6 | 0.9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 76 | 71 | 73 | 74 | 73 | 75 | 72 | 74 | 73 | 75 | 80 |
| Relative humidity (%) | 92 | 90 | 87 | 85 | 84 | 83 | 85 | 85 | 86 | 87 | 90 | 91 |
| Wind speed (mph) | 10.9 | 10.8 | 10.1 | 9.0 | 7.5 | 6.2 | 5.7 | 6.4 | 8.2 | 9.3 | 10.6 | 10.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 76 | 71 | 73 | 74 | 73 |
| Relative humidity (%) | 92 | 90 | 87 | 85 | 84 | 83 |
| Wind speed (mph) | 10.9 | 10.8 | 10.1 | 9.0 | 7.5 | 6.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 72 | 74 | 73 | 75 | 80 |
| Relative humidity (%) | 85 | 85 | 86 | 87 | 90 | 91 |
| Wind speed (mph) | 5.7 | 6.4 | 8.2 | 9.3 | 10.6 | 10.9 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Homer AP (NOAA GHCN station USW00025507), about 3 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.