Monthly climate in Saint John's, Antigua and Barbuda

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Saint John's features a tropical rainforest climate (Af).Temperatures typically range between 25 °C (77 °F) and 28 °C (82 °F) through the year, but rarely can drop to 22 °C (72 °F) or can rise to as high as 29 °C (85 °F).The average annual precipitation amounts to about 817 mm (32.2 inches) and receives 191 rainy days on the 1 mm (0.04 inches) threshold annually.Saint John's enjoys an average of 3935 hours of sunshine throughout the year, and daylight varies from 11 hours 7 minutes to 13 hours 7 minutes per day.

Monthly average temperatures in Saint John's, Antigua and Barbuda §

The warmest months in Saint John's are August, September and October, with daily mean temperatures ranging from 27 to 28 °C (81 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 25 to 25 °C (77 - 78 °F) throughout the day. On average each year, Saint John's experiences 321 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Saint John's, Antigua and Barbuda.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 27°C
(80°F)
26°C
(80°F)
26°C
(80°F)
27°C
(82°F)
28°C
(82°F)
28°C
(83°F)
29°C
(84°F)
29°C
(84°F)
29°C
(85°F)
29°C
(85°F)
28°C
(83°F)
28°C
(82°F)
Mean maximum 27°C
(80°F)
26°C
(79°F)
26°C
(79°F)
27°C
(80°F)
27°C
(81°F)
28°C
(82°F)
28°C
(83°F)
28°C
(84°F)
29°C
(84°F)
29°C
(84°F)
28°C
(82°F)
27°C
(81°F)
Average high 26°C
(79°F)
25°C
(78°F)
26°C
(78°F)
26°C
(79°F)
27°C
(80°F)
27°C
(81°F)
28°C
(82°F)
28°C
(83°F)
28°C
(83°F)
28°C
(82°F)
27°C
(81°F)
26°C
(80°F)
Daily mean 25°C
(78°F)
25°C
(77°F)
25°C
(77°F)
25°C
(78°F)
26°C
(79°F)
27°C
(80°F)
27°C
(81°F)
27°C
(82°F)
28°C
(82°F)
27°C
(81°F)
27°C
(80°F)
26°C
(79°F)
Average low 24°C
(76°F)
24°C
(76°F)
24°C
(76°F)
25°C
(77°F)
25°C
(78°F)
26°C
(79°F)
26°C
(80°F)
27°C
(80°F)
27°C
(80°F)
26°C
(80°F)
26°C
(79°F)
25°C
(77°F)
Mean minimum 23°C
(74°F)
23°C
(73°F)
23°C
(74°F)
24°C
(75°F)
24°C
(76°F)
25°C
(77°F)
25°C
(78°F)
26°C
(78°F)
25°C
(78°F)
25°C
(77°F)
25°C
(77°F)
24°C
(75°F)
Minimum 23°C
(73°F)
22°C
(72°F)
23°C
(73°F)
23°C
(74°F)
24°C
(75°F)
24°C
(76°F)
25°C
(78°F)
25°C
(78°F)
25°C
(77°F)
25°C
(77°F)
24°C
(76°F)
24°C
(75°F)

Compare climate in Saint John's with other places

Compare temperature, precipitation, sunshine, UV index in Saint John's, Antigua and Barbuda with other places around the world.

Monthly average precipitation in Saint John's, Antigua and Barbuda §

Saint John's usually has the most precipitation in August, September and October, with an average of 19 rainy days and 116 mm (4.6 inches) of precipitation per month.The driest months in Saint John's are January, February and March. On average, 34 mm (1.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Saint John's, Antigua and Barbuda.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 34 (1.4) 36 (1.4) 31 (1.2) 38 (1.5) 49 (1.9) 52 (2.0) 81 (3.2) 97 (3.8) 144 (5.7) 109 (4.3) 94 (3.7) 52 (2.1)
Average precipitation days (≥ 1 mm) 12 14 11 14 15 14 19 18 21 18 17 18

Monthly sunshine hours in Saint John's, Antigua and Barbuda §

The sunniest months in Saint John's are May, July and August, when the sun shines an average of 11 hours 29 minutes a day.Least sunny months in Saint John's: January, February and November receive an average of 9 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Saint John's, Antigua and Barbuda.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 262 302 347 342 357 338 360 351 320 318 307 325
Mean daily daylight hours 11h 13m 11h 34m 12h 2m 12h 31m 12h 55m 13h 7m 13h 0m 12h 39m 12h 12m 11h 43m 11h 19m 11h 7m

Solar UV radiation in Saint John's, Antigua and Barbuda §

Saint John's experiences the highest level of ultraviolet (UV) radiation in April, July and September, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure.January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly Saint John's UV Index data.

Average daily maximum UV levels by month for Saint John's, Antigua and Barbuda.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 9 11 13 13 13 13 14 13 13 12 9 9