Frost Dates for ST. HELENA IS., Saint Helena

Elevation: 238 m

Frost Dates

This location never reaches freezing temperatures, so you can plant year-round!

In tropical and subtropical climates, the main challenge isn’t frost — it’s heat and humidity. Learn more about gardening in tropical climates.

-15.93°N, -5.67°W © OpenStreetMap

USDA Hardiness Zone iHardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.

Zone 13a

Avg. annual minimum: 16 to 18°C

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

BWh Hot Desert

Very hot and extremely dry with minimal rainfall. Irrigation is essential for any gardening. Heat-tolerant crops and desert-adapted plants thrive; shade structures help in peak summer.

Köppen climate map

Temperature

15° 20° 25°
21°
High: 21°C
Avg: 21°C
Low: 20°C
Jan
22°
High: 22°C
Avg: 22°C
Low: 21°C
Feb
22°
High: 23°C
Avg: 22°C
Low: 22°C
Mar
22°
High: 22°C
Avg: 22°C
Low: 21°C
Apr
21°
High: 21°C
Avg: 21°C
Low: 21°C
May
20°
High: 20°C
Avg: 20°C
Low: 19°C
Jun
19°
High: 19°C
Avg: 19°C
Low: 18°C
Jul
18°
High: 18°C
Avg: 18°C
Low: 17°C
Aug
18°
High: 18°C
Avg: 18°C
Low: 17°C
Sep
18°
High: 18°C
Avg: 18°C
Low: 17°C
Oct
18°
High: 19°C
Avg: 18°C
Low: 18°C
Nov
19°
High: 20°C
Avg: 19°C
Low: 19°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm
0 mm
0.0 mm
Jan
0 mm
0.0 mm
Feb
0 mm
0.0 mm
Mar
0 mm
0.0 mm
Apr
0 mm
0.0 mm
May
0 mm
0.0 mm
Jun
0 mm
0.0 mm
Jul
0 mm
0.0 mm
Aug
0 mm
0.0 mm
Sep
0 mm
0.0 mm
Oct
0 mm
0.0 mm
Nov
0 mm
0.0 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec13h12.5h12h11.5h11.5h11h11h11.5h12h12.5h13h13h
Jan: 5:34 AM – 6:26 PM · 12h 51m
Feb: 5:45 AM – 6:15 PM · 12h 31m
Mar: 5:57 AM – 6:03 PM · 12h 06m
Apr: 6:11 AM – 5:49 PM · 11h 38m
May: 6:22 AM – 5:38 PM · 11h 15m
Jun: 6:28 AM – 5:32 PM · 11h 03m
Jul: 6:26 AM – 5:34 PM · 11h 08m
Aug: 6:16 AM – 5:44 PM · 11h 28m
Sep: 6:03 AM – 5:57 PM · 11h 55m
Oct: 5:49 AM – 6:11 PM · 12h 22m
Nov: 5:37 AM – 6:23 PM · 12h 46m
Dec: 5:32 AM – 6:28 PM · 12h 57m
Daylight Longest: 12h 57m · Shortest: 11h 03m

Plan Your Garden with Planter

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