San Juan weather by month

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

Temperature
Rainfall
Sunshine & daylight
UV levels & humidity

Temperature in San Juan (°C)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	14	15	16	18	21	25	29	29	27	23	18	16
Min temperature (night-time)	7	7	8	10	13	17	20	21	19	15	11	8
Heat & Humidity	0	0	0	0	0	0	M	M	L	0	0	0
Sea temperature	15	14	14	16	18	22	25	26	25	22	19	16

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

Sunshine & Daylight in San Juan

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	5	6	6	8	9	10	11	10	8	7	6	5
Daily hours of daylight	10	11	12	13	14	15	15	14	12	11	10	9
UV Index (Maximum)	2	3	5	6	8	9	9	8	6	4	2	2

Rainfall in San Juan

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	14	12	12	10	8	6	3	5	7	11	11	13
Average monthly rainfall (mm)	39	32	41	40	29	18	7	27	48	74	54	57

More about San Juan

San Juan by month

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

Recommended for Ibiza

TUI sale: up to £300 off holidays in 2026/2027

Sale

Save up to £300 on holidays (Jan 2026-Nov 2027)
Book online with TUI Black Friday discount code
Sign up to myTUI. Discount varies by spend. T&Cs apply

Go to TUI deal >>

Expires at 23:59 on Tuesday 2nd Dec 2025 · View all TUI offers

TUI deal finder

Destination

The climate guide for Ibiza (San Juan) 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 San Juan?

San Juan has a cool semi arid climate with hot summers.

San Juan weather in January

Expect daytime maximum temperatures of 14°C in San Juan, Ibiza in January based on long-term weather averages. There are 5 hours of sunshine per day on average with 14 days with some rainfall.

14
14°C max day temperature
5
5 hours of sunshine per day
14
14 days with some rainfall
7
7°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
39
39 mm of monthly rainfall
2
2 (Low) UV index
15
15°C sea temperature

Back to months

San Juan weather in February

Expect daytime maximum temperatures of 15°C in San Juan, Ibiza in February based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall.

15
15°C max day temperature
6
6 hours of sunshine per day
12
12 days with some rainfall
7
7°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
32
32 mm of monthly rainfall
3
3 (Moderate) UV index
14
14°C sea temperature

Back to months

San Juan weather in March

Expect daytime maximum temperatures of 16°C in San Juan, Ibiza in March based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 41 mm of rainfall in the month.

16
16°C max day temperature
6
6 hours of sunshine per day
12
12 days with some rainfall
8
8°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
41
41 mm of monthly rainfall
5
5 (Moderate) UV index
14
14°C sea temperature

Back to months

San Juan weather in April

Expect daytime maximum temperatures of 18°C in San Juan, Ibiza in April based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 40 mm of rainfall in the month.

18
18°C max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
10
10°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
40
40 mm of monthly rainfall
6
6 (High) UV index
16
16°C sea temperature

Back to months

San Juan weather in May

Expect daytime maximum temperatures of 21°C in San Juan, Ibiza in May based on long-term weather averages. There are 9 hours of sunshine per day on average.

21
21°C max day temperature
9
9 hours of sunshine per day
8
8 days with some rainfall
13
13°C min night temperature
14
14 hours of daylight per day
0
No heat & humidity
29
29 mm of monthly rainfall
8
8 (Very High) UV index
18
18°C sea temperature

Back to months

San Juan weather in June

Expect daytime maximum temperatures of 25°C in San Juan, Ibiza in June based on long-term weather averages. There are 10 hours of sunshine per day on average.

25
25°C max day temperature
10
10 hours of sunshine per day
6
6 days with some rainfall
17
17°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
18
18 mm of monthly rainfall
9
9 (Very High) UV index
22
22°C sea temperature

Back to months

San Juan weather in July

Expect daytime maximum temperatures of 29°C in San Juan, Ibiza in July based on long-term weather averages. There are 11 hours of sunshine per day on average.

29
29°C max day temperature
11
11 hours of sunshine per day
3
3 days with some rainfall
20
20°C min night temperature
15
15 hours of daylight per day
M
Moderate heat & humidity
7
7 mm of monthly rainfall
9
9 (Very High) UV index
25
25°C sea temperature

Back to months

San Juan weather in August

Expect daytime maximum temperatures of 29°C in San Juan, Ibiza in August based on long-term weather averages. There are 10 hours of sunshine per day on average.

29
29°C max day temperature
10
10 hours of sunshine per day
5
5 days with some rainfall
21
21°C min night temperature
14
14 hours of daylight per day
M
Moderate heat & humidity
27
27 mm of monthly rainfall
8
8 (Very High) UV index
26
26°C sea temperature

Back to months

San Juan weather in September

Expect daytime maximum temperatures of 27°C in San Juan, Ibiza in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 48 mm of rainfall in the month.

27
27°C max day temperature
8
8 hours of sunshine per day
7
7 days with some rainfall
19
19°C min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
48
48 mm of monthly rainfall
6
6 (High) UV index
25
25°C sea temperature

Back to months

San Juan weather in October

Expect daytime maximum temperatures of 23°C in San Juan, Ibiza in October based on long-term weather averages. There are 7 hours of sunshine per day on average with 11 days with some rainfall and typically 74 mm of rainfall in the month.

23
23°C max day temperature
7
7 hours of sunshine per day
11
11 days with some rainfall
15
15°C min night temperature
11
11 hours of daylight per day
0
No heat & humidity
74
74 mm of monthly rainfall
4
4 (Moderate) UV index
22
22°C sea temperature

Back to months

San Juan weather in November

Expect daytime maximum temperatures of 18°C in San Juan, Ibiza in November based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 54 mm of rainfall in the month.

18
18°C max day temperature
6
6 hours of sunshine per day
11
11 days with some rainfall
11
11°C min night temperature
10
10 hours of daylight per day
0
No heat & humidity
54
54 mm of monthly rainfall
2
2 (Low) UV index
19
19°C sea temperature

Back to months

San Juan weather in December

Expect daytime maximum temperatures of 16°C in San Juan, Ibiza in December based on long-term weather averages. There are 5 hours of sunshine per day on average with 13 days with some rainfall and typically 57 mm of rainfall in the month.

16
16°C max day temperature
5
5 hours of sunshine per day
13
13 days with some rainfall
8
8°C min night temperature
9
9 hours of daylight per day
0
No heat & humidity
57
57 mm of monthly rainfall
2
2 (Low) UV index
16
16°C sea temperature

Back to months