Temperature
Pleasant by day, warm at night.
76°Ftypical December high
Typical range
December climate
December in Ascension Island
St. Helena, Ascension and Tristan da Cunha
Warm coastal days and plenty of sun. Wind on exposed beaches is the main drawback.
Good overall
Daytime high
76°F
Lows around 75°F
Rain
Very little rain
Sun
12 h/day
Air feel
Humid
Sea temp
77°F
Great for swimming
Wind
16 mph
Windy
When to visit
Month-by-month fit
Best
Precipitation
Rain is infrequent in December.
~0%wet-day frequency
AmountWet-day chance
Sunshine
Plenty of sun this month.
11.8 hDecember sunshine
Heat & humidity by month
Humidity is noticeable this month.
98%December Heat feel
Easy airWarm airHumid airVery humid air
Hourly temperature pattern
In December, afternoons feel about 74° and nights feel near 73°.
ComfortableWarmNight hours
Clear sky
Partly cloudy skies this month.
49%December Clear sky
Clear skyCloud
Steady wind
December's steady trade-wind breeze keeps the air from feeling as stagnant.
16 mphDecember Windy
Sea temperature
77°FDecember sea temp
More detailIncludes daypart comfort
Typical December day
December stays around 76°F through the day and night.
Avg temp Typical range
Morning75°F
Rain2%
Cloud53%
Humid airVery high
Sun intensityModerate
Midday76°F
Rain1%
Cloud50%
Humid airVery high
Sun intensityStrong
Late afternoon76°F
Rain1%
Cloud48%
Humid airVery high
Sun intensityStrong
Early evening76°F
Rain1%
Cloud48%
Humid airVery high
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 78 | 76 | 0.1 | 1 | 11.9 | 79 | 79 |
| Feb | 79 | 78 | 0.3 | 2 | 11.9 | 78 | 80 |
| Mar | 81 | 79 | 0.6 | 4 | 11.9 | 77 | 82 |
| Apr | 81 | 79 | 0.7 | 4 | 11.7 | 76 | 82 |
| May | 80 | 78 | 0.3 | 3 | 11.4 | 74 | 82 |
| Jun | 78 | 77 | 0.3 | 3 | 11.2 | 72 | 80 |
| Jul | 76 | 75 | 0.4 | 3 | 11.2 | 72 | 78 |
| Aug | 75 | 74 | 0.2 | 2 | 11.3 | 75 | 77 |
| Sep | 74 | 73 | 0.1 | 0 | 11.3 | 77 | 76 |
| Oct | 74 | 73 | 0.1 | 0 | 11.4 | 78 | 76 |
| Nov | 75 | 74 | 0.0 | 0 | 11.6 | 79 | 76 |
| Dec | 76 | 75 | 0.1 | 0 | 11.8 | 79 | 77 |
Similar climates
Similar
Similar travel stylePort LouisMauritiusSimilar travel styleAntiguaAntigua and BarbudaSimilar travel stylePort DenarauFijiSimilar travel styleNassauBahamas
Want a side-by-side climate view? Compare Ascension Island with Port Louis.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology