Galissas weather by month

Check out Galissas weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature in Galissas (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
13°C maximum daytime temperature in January in Galissas13
13°C maximum daytime temperature in February in Galissas13
15°C maximum daytime temperature in March in Galissas15
18°C maximum daytime temperature in April in Galissas18
22°C maximum daytime temperature in May in Galissas22
26°C maximum daytime temperature in June in Galissas26
28°C maximum daytime temperature in July in Galissas28
27°C maximum daytime temperature in August in Galissas27
25°C maximum daytime temperature in September in Galissas25
21°C maximum daytime temperature in October in Galissas21
18°C maximum daytime temperature in November in Galissas18
15°C maximum daytime temperature in December in Galissas15
Min temperature (night-time)
8°C minimum night-time temperature in January in Galissas8
8°C minimum night-time temperature in February in Galissas8
9°C minimum night-time temperature in March in Galissas9
12°C minimum night-time temperature in April in Galissas12
15°C minimum night-time temperature in May in Galissas15
19°C minimum night-time temperature in June in Galissas19
22°C minimum night-time temperature in July in Galissas22
21°C minimum night-time temperature in August in Galissas21
19°C minimum night-time temperature in September in Galissas19
16°C minimum night-time temperature in October in Galissas16
13°C minimum night-time temperature in November in Galissas13
10°C minimum night-time temperature in December in Galissas10
Heat & Humidity
No heat & humidity in January in Galissas0
No heat & humidity in February in Galissas0
No heat & humidity in March in Galissas0
No heat & humidity in April in Galissas0
No heat & humidity in May in Galissas0
Low heat & humidity in June in GalissasL
Moderate heat & humidity in July in GalissasM
Moderate heat & humidity in August in GalissasM
Low heat & humidity in September in GalissasL
No heat & humidity in October in Galissas0
No heat & humidity in November in Galissas0
No heat & humidity in December in Galissas0
Sea temperature
15°C sea temperature in January in Galissas15
15°C sea temperature in February in Galissas15
15°C sea temperature in March in Galissas15
16°C sea temperature in April in Galissas16
18°C sea temperature in May in Galissas18
22°C sea temperature in June in Galissas22
23°C sea temperature in July in Galissas23
24°C sea temperature in August in Galissas24
23°C sea temperature in September in Galissas23
21°C sea temperature in October in Galissas21
18°C sea temperature in November in Galissas18
16°C sea temperature in December in Galissas16

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

Sunshine & Daylight in Galissas

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
10 hours of daylight per day in January in Galissas10
11 hours of daylight per day in February in Galissas11
12 hours of daylight per day in March in Galissas12
13 hours of daylight per day in April in Galissas13
14 hours of daylight per day in May in Galissas14
15 hours of daylight per day in June in Galissas15
14 hours of daylight per day in July in Galissas14
14 hours of daylight per day in August in Galissas14
12 hours of daylight per day in September in Galissas12
11 hours of daylight per day in October in Galissas11
10 hours of daylight per day in November in Galissas10
10 hours of daylight per day in December in Galissas10
UV Index (Maximum)
UV (maximum) index 2 (Low) in January in Galissas2
UV (maximum) index 3 (Moderate) in February in Galissas3
UV (maximum) index 5 (Moderate) in March in Galissas5
UV (maximum) index 6 (High) in April in Galissas6
UV (maximum) index 8 (Very High) in May in Galissas8
UV (maximum) index 9 (Very High) in June in Galissas9
UV (maximum) index 10 (Very High) in July in Galissas10
UV (maximum) index 9 (Very High) in August in Galissas9
UV (maximum) index 7 (High) in September in Galissas7
UV (maximum) index 5 (Moderate) in October in Galissas5
UV (maximum) index 3 (Moderate) in November in Galissas3
UV (maximum) index 2 (Low) in December in Galissas2

Rainfall in Galissas

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
10 days with some rainfall in January in Galissas10
9 days with some rainfall in February in Galissas9
8 days with some rainfall in March in Galissas8
6 days with some rainfall in April in Galissas6
3 days with some rainfall in May in Galissas3
1 day with some rainfall in June in Galissas1
1 day with some rainfall in July in Galissas1
1 day with some rainfall in August in Galissas1
1 day with some rainfall in September in Galissas1
4 days with some rainfall in October in Galissas4
8 days with some rainfall in November in Galissas8
11 days with some rainfall in December in Galissas11
Average monthly rainfall (mm)
90 mm monthly rainfall in January in Galissas90
63 mm monthly rainfall in February in Galissas63
56 mm monthly rainfall in March in Galissas56
26 mm monthly rainfall in April in Galissas26
16 mm monthly rainfall in May in Galissas16
5 mm monthly rainfall in June in Galissas5
2 mm monthly rainfall in July in Galissas2
2 mm monthly rainfall in August in Galissas2
12 mm monthly rainfall in September in Galissas12
48 mm monthly rainfall in October in Galissas48
63 mm monthly rainfall in November in Galissas63
91 mm monthly rainfall in December in Galissas91

More about Galissas

Galissas by month

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

Recommended for Syros

TUI discount code: up to £300 off 2025/2026 holidays

  • Save up to £300 on package holidays in 2025/2026
  • Book in TUI sale. Discount varies by spend. T&Cs apply
  • Travel between 1st May 2025 & 31st Oct 2026 (inclusive)
Show discount codeShow discount code ******ALE
Redeem TUI discount code >>

Expires at 10:00 on Friday 31st Jan 2025 · View all TUI offers

TUITUI deal finder

The climate guide for Syros, represented by Galissas, (Galissas) 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.

What's the climate like in Galissas?

Galissas has a temperate climate with hot dry summers.

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

Back to top

More about Greece

Compare Galissas with the UK

Below the Galissas chart shows average maximum daytime temperature for Galissas, Syros, Greece and the UK (London).

Maximum daytime temperature (°C)

Galissas, Syros, Greece
UK (London)
13
7
13
7
15
10
18
13
22
17
26
20
28
22
27
22
25
19
21
15
18
10
15
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

Compare more Galissas weather >>

Back to top

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^