British Indian Ocean Territory weather by month

Check out the British Indian Ocean Territory weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in British Indian Ocean Territory (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
30°C maximum daytime temperature in January in British Indian Ocean Territory (Diego Garcia)30
31°C maximum daytime temperature in February in British Indian Ocean Territory (Diego Garcia)31
31°C maximum daytime temperature in March in British Indian Ocean Territory (Diego Garcia)31
31°C maximum daytime temperature in April in British Indian Ocean Territory (Diego Garcia)31
30°C maximum daytime temperature in May in British Indian Ocean Territory (Diego Garcia)30
29°C maximum daytime temperature in June in British Indian Ocean Territory (Diego Garcia)29
29°C maximum daytime temperature in July in British Indian Ocean Territory (Diego Garcia)29
29°C maximum daytime temperature in August in British Indian Ocean Territory (Diego Garcia)29
29°C maximum daytime temperature in September in British Indian Ocean Territory (Diego Garcia)29
29°C maximum daytime temperature in October in British Indian Ocean Territory (Diego Garcia)29
30°C maximum daytime temperature in November in British Indian Ocean Territory (Diego Garcia)30
30°C maximum daytime temperature in December in British Indian Ocean Territory (Diego Garcia)30
Min temperature (night-time)
25°C minimum night-time temperature in January in British Indian Ocean Territory (Diego Garcia)25
25°C minimum night-time temperature in February in British Indian Ocean Territory (Diego Garcia)25
26°C minimum night-time temperature in March in British Indian Ocean Territory (Diego Garcia)26
26°C minimum night-time temperature in April in British Indian Ocean Territory (Diego Garcia)26
25°C minimum night-time temperature in May in British Indian Ocean Territory (Diego Garcia)25
25°C minimum night-time temperature in June in British Indian Ocean Territory (Diego Garcia)25
24°C minimum night-time temperature in July in British Indian Ocean Territory (Diego Garcia)24
24°C minimum night-time temperature in August in British Indian Ocean Territory (Diego Garcia)24
24°C minimum night-time temperature in September in British Indian Ocean Territory (Diego Garcia)24
25°C minimum night-time temperature in October in British Indian Ocean Territory (Diego Garcia)25
25°C minimum night-time temperature in November in British Indian Ocean Territory (Diego Garcia)25
25°C minimum night-time temperature in December in British Indian Ocean Territory (Diego Garcia)25
Heat & Humidity
High heat & humidity in January in British Indian Ocean Territory (Diego Garcia)H
High heat & humidity in February in British Indian Ocean Territory (Diego Garcia)H
Very high heat & humidity in March in British Indian Ocean Territory (Diego Garcia)VH
Very high heat & humidity in April in British Indian Ocean Territory (Diego Garcia)VH
High heat & humidity in May in British Indian Ocean Territory (Diego Garcia)H
High heat & humidity in June in British Indian Ocean Territory (Diego Garcia)H
Moderate heat & humidity in July in British Indian Ocean Territory (Diego Garcia)M
Moderate heat & humidity in August in British Indian Ocean Territory (Diego Garcia)M
High heat & humidity in September in British Indian Ocean Territory (Diego Garcia)H
High heat & humidity in October in British Indian Ocean Territory (Diego Garcia)H
High heat & humidity in November in British Indian Ocean Territory (Diego Garcia)H
High heat & humidity in December in British Indian Ocean Territory (Diego Garcia)H
Sea temperature
29°C sea temperature in January in British Indian Ocean Territory (Diego Garcia)29
28°C sea temperature in February in British Indian Ocean Territory (Diego Garcia)28
29°C sea temperature in March in British Indian Ocean Territory (Diego Garcia)29
29°C sea temperature in April in British Indian Ocean Territory (Diego Garcia)29
28°C sea temperature in May in British Indian Ocean Territory (Diego Garcia)28
27°C sea temperature in June in British Indian Ocean Territory (Diego Garcia)27
27°C sea temperature in July in British Indian Ocean Territory (Diego Garcia)27
26°C sea temperature in August in British Indian Ocean Territory (Diego Garcia)26
27°C sea temperature in September in British Indian Ocean Territory (Diego Garcia)27
28°C sea temperature in October in British Indian Ocean Territory (Diego Garcia)28
28°C sea temperature in November in British Indian Ocean Territory (Diego Garcia)28
29°C sea temperature in December in British Indian Ocean Territory (Diego Garcia)29

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & Daylight in British Indian Ocean Territory

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of daylight
12 hours of daylight per day in January in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in February in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in March in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in April in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in May in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in June in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in July in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in August in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in September in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in October in British Indian Ocean Territory (Diego Garcia)12
12 hours of daylight per day in November in British Indian Ocean Territory (Diego Garcia)12
13 hours of daylight per day in December in British Indian Ocean Territory (Diego Garcia)13
UV Index (Maximum)
UV (maximum) index 11+ (Extreme) in January in British Indian Ocean Territory (Diego Garcia)11
UV (maximum) index 11+ (Extreme) in February in British Indian Ocean Territory (Diego Garcia)11
UV (maximum) index 11+ (Extreme) in March in British Indian Ocean Territory (Diego Garcia)11
UV (maximum) index 11+ (Extreme) in April in British Indian Ocean Territory (Diego Garcia)11
UV (maximum) index 11 (Extreme) in May in British Indian Ocean Territory (Diego Garcia)11
UV (maximum) index 10 (Very High) in June in British Indian Ocean Territory (Diego Garcia)10
UV (maximum) index 10 (Very High) in July in British Indian Ocean Territory (Diego Garcia)10
UV (maximum) index 11+ (Extreme) in August in British Indian Ocean Territory (Diego Garcia)11
UV (maximum) index 11+ (Extreme) in September in British Indian Ocean Territory (Diego Garcia)11
UV (maximum) index 11+ (Extreme) in October in British Indian Ocean Territory (Diego Garcia)11
UV (maximum) index 11+ (Extreme) in November in British Indian Ocean Territory (Diego Garcia)11
UV (maximum) index 11+ (Extreme) in December in British Indian Ocean Territory (Diego Garcia)11

Rainfall in British Indian Ocean Territory

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
16 days with some rainfall in January in British Indian Ocean Territory (Diego Garcia)16
14 days with some rainfall in February in British Indian Ocean Territory (Diego Garcia)14
15 days with some rainfall in March in British Indian Ocean Territory (Diego Garcia)15
15 days with some rainfall in April in British Indian Ocean Territory (Diego Garcia)15
16 days with some rainfall in May in British Indian Ocean Territory (Diego Garcia)16
14 days with some rainfall in June in British Indian Ocean Territory (Diego Garcia)14
14 days with some rainfall in July in British Indian Ocean Territory (Diego Garcia)14
14 days with some rainfall in August in British Indian Ocean Territory (Diego Garcia)14
16 days with some rainfall in September in British Indian Ocean Territory (Diego Garcia)16
18 days with some rainfall in October in British Indian Ocean Territory (Diego Garcia)18
17 days with some rainfall in November in British Indian Ocean Territory (Diego Garcia)17
17 days with some rainfall in December in British Indian Ocean Territory (Diego Garcia)17
Average monthly rainfall (mm)
291 mm monthly rainfall in January in British Indian Ocean Territory (Diego Garcia)291
248 mm monthly rainfall in February in British Indian Ocean Territory (Diego Garcia)248
195 mm monthly rainfall in March in British Indian Ocean Territory (Diego Garcia)195
171 mm monthly rainfall in April in British Indian Ocean Territory (Diego Garcia)171
164 mm monthly rainfall in May in British Indian Ocean Territory (Diego Garcia)164
138 mm monthly rainfall in June in British Indian Ocean Territory (Diego Garcia)138
143 mm monthly rainfall in July in British Indian Ocean Territory (Diego Garcia)143
152 mm monthly rainfall in August in British Indian Ocean Territory (Diego Garcia)152
228 mm monthly rainfall in September in British Indian Ocean Territory (Diego Garcia)228
245 mm monthly rainfall in October in British Indian Ocean Territory (Diego Garcia)245
201 mm monthly rainfall in November in British Indian Ocean Territory (Diego Garcia)201
254 mm monthly rainfall in December in British Indian Ocean Territory (Diego Garcia)254

More about the British Indian Ocean Territory

British Indian Ocean Territory by month

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

Recommended for the British Indian Ocean Territory

Travel Up: up to £15 off Christmas Eve flights

  • Save up to £15 on flights booked for Christmas Eve
  • Offer valid for bookings over £250 with Travel Up
  • Travel before 25th December 2023 (inclusive)
Show discount codeShow discount code ******S15
Redeem Travel Up discount code >>

Expires at 23:59 on Monday 25th Dec 2023 · View all Travel Up offers

The climate guide for British Indian Ocean Territory, represented by Diego Garcia, (Diego Garcia) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

Tropical storm risk: British Indian Ocean Territory cyclone season

% of month affected by tropical storms
1.3%
0
0
0
0
0
0
0
<1%
1.5%
2.1%
1.5%
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

TUI: up to 8% off holidays booked online

  • Book online with TUI & save up to 8% on holidays
  • FREE child places available for selected holidays
  • Pay £0 holiday deposits with direct debit
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

Back to top

Compare British Indian Ocean Territory with the USA

Below the British Indian Ocean Territory chart shows average maximum daytime temperature for British Indian Ocean Territory (Diego Garcia) and the USA (Washington).

Maximum daytime temperature (°C)

British Indian Ocean Territory (Diego Garcia)
USA (Washington)
30
5
31
7
31
13
31
19
30
24
29
29
29
31
29
30
29
26
29
20
30
14
30
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more British Indian Ocean Territory weather >>

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

Top ^