San Diego vs Honolulu weather
July highs: 75°F in San Diego, 88°F in Honolulu (Honolulu is 13°F warmer). January highs: 66°F and 81°F (Honolulu is 15°F warmer). San Diego has about 40 wet days a year, Honolulu about 89. Muggy days: about 16 a year in San Diego, about 212 in Honolulu.
San Diego, CA
Best months: May, June
Honolulu, HI
Best months: February, March, June
Which city for what
- Milder winters: Honolulu (January high 81°F vs January high 66°F)
- Cooler summers: San Diego (July high 75°F vs July high 88°F)
- Fewer wet days: San Diego (40 a year vs 89 a year)
- Less humid: San Diego (16 muggy days vs 212 muggy days)
- More comfortable days: San Diego (197 a year vs 19 a year)
Listed only where the difference is at least 3°F in highs, 10 days a year or 3 in of snow.
Season by season
| Season | Avg high San Diego | Avg high Honolulu | Wet days San Diego | Wet days Honolulu |
|---|---|---|---|---|
| Winter (Dec-Feb) | 66°F | 81°F | 19 | 24 |
| Spring (Mar-May) | 68°F | 83°F | 12 | 22 |
| Summer (Jun-Aug) | 75°F | 88°F | 2 | 19 |
| Fall (Sep-Nov) | 74°F | 86°F | 7 | 23 |
Side by side over a year
| San Diego | Honolulu | |
|---|---|---|
| Hot days (90°F+) | 3 | 32 |
| Freezing nights | 0 | 0 |
| Muggy days | 16 | 212 |
| Comfortable days | 197 | 19 |
| Precipitation | 9.8 in | 16.4 in |
| Snowfall | 0.0 in | 0.0 in |
| Frost dates | frost-free | frost-free |
| Daylight in June / December | 14.3 h / 10.0 h | 13.4 h / 10.9 h |
| Best months | May, June | February, March, June |
Day counts from each city's daily records, 1991-2020. Comfortable days: highs 65-80°F and dew point under 60°F.
Month by month
| Month | High San Diego | High Honolulu | Wet days San Diego | Wet days Honolulu |
|---|---|---|---|---|
| January | 66°F | 81°F | 7 | 8 |
| February | 66°F | 81°F | 7 | 8 |
| March | 67°F | 81°F | 6 | 9 |
| April | 69°F | 83°F | 4 | 8 |
| May | 70°F | 85°F | 2 | 6 |
| June | 72°F | 87°F | 1 | 6 |
| July | 75°F | 88°F | 1 | 7 |
| August | 77°F | 89°F | 0 | 6 |
| September | 77°F | 88°F | 1 | 7 |
| October | 75°F | 87°F | 2 | 8 |
| November | 71°F | 84°F | 4 | 9 |
| December | 66°F | 82°F | 6 | 9 |
Both charts use the same temperature scale.
Where the numbers come from
- San Diego, CA: temperature from San Diego Lindbergh Fld (USW00023188), 2.0 mi NW of the city center; precipitation from San Diego Lindbergh Fld (USW00023188). NOAA 1991-2020 normals and daily records.
- Honolulu, HI: temperature from Honolulu Intl Airport (USW00022521), 4.7 mi WNW of the city center; precipitation from Honolulu Intl Airport (USW00022521). NOAA 1991-2020 normals and daily records.
Every station for each city, including humidity and frost, is listed on the city page. Methodology.