Annual mean 26°C · wettest around November · prevailing wind E
Warmest
32.8 °C
Coldest
27.6 °C
Wettest
90%
Windiest
5.1 m/s
Prevailing
E
4.3 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Río San Juan over the whole year is 26°C. September is the hottest month, with highs of about 32°C; February is the coldest, with lows of about 21°C. Río San Juan has no sharply defined rainy season: the chance of rain on a given day runs from 67% in July, the driest month, to 79% in November, the wettest. Winds in Río San Juan are highest in July, averaging 2.8 m/s (10 km/h), and lightest in October, at 1.9 m/s (7 km/h). The prevailing wind is from the E. The clearest skies in Río San Juan come in December, when the sky is typically 48% covered; May is the cloudiest month, at 55%.
Month by month Río San Juan climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
28°C
22°C
30°C
74%
49%
2.1 m/s
15
75
1
February
28°C
21°C
30°C
67%
50%
2.4 m/s
22
72
2
March
28°C
21°C
30°C
69%
48%
2.3 m/s
20
71
2
April
29°C
22°C
31°C
69%
52%
2.6 m/s
11
71
0
May
30°C
24°C
33°C
67%
55%
2.5 m/s
3
50
0
June
31°C
25°C
35°C
69%
51%
2.5 m/s
1
30
0
July
31°C
25°C
34°C
67%
50%
2.8 m/s
1
34
0
August
31°C
25°C
35°C
72%
49%
2.6 m/s
1
30
0
September
32°C
25°C
36°C
73%
55%
2.8 m/s
1
24
0
October
31°C
24°C
34°C
71%
53%
1.9 m/s
1
33
0
November
30°C
24°C
34°C
79%
53%
2.0 m/s
2
41
0
December
28°C
23°C
31°C
70%
48%
2.1 m/s
7
69
0
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Río San Juan weather by season
Year round, Río San Juan has days of about 28°C at their warmest in January, its coolest month, and 32°C in September, its warmest; the coolest hours of the day run from 21°C to 25°C through the year, and the average temperature over the year is 26°C around the clock. Rain is most likely around November and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Río San Juan weather in winterDecember to February
High 28°CLow 22°CRain 70%
Winter in Río San Juan has typical daily highs of about 28°C and lows of about 22°C, with a 70% chance of rain on a given day.
Río San Juan weather in springMarch to May
High 29°CLow 22°CRain 68%
Spring in Río San Juan has typical daily highs of about 29°C and lows of about 22°C, with a 68% chance of rain on a given day.
Río San Juan weather in summerJune to August
High 31°CLow 25°CRain 69%
Summer in Río San Juan has typical daily highs of about 31°C and lows of about 25°C, with a 69% chance of rain on a given day.
Río San Juan weather in autumnSeptember to November
High 31°CLow 24°CRain 74%
Autumn in Río San Juan has typical daily highs of about 31°C and lows of about 24°C, with a 74% chance of rain on a given day.
When is the rainy season in Río San Juan?
Río San Juan has no sharply defined rainy season: the chance of rain on a given day runs from 67% in July, the driest month, to 79% in November, the wettest.
What time of year is Río San Juan windiest?
Winds in Río San Juan are highest in July, averaging 2.8 m/s (10 km/h), and lightest in October, at 1.9 m/s (7 km/h). The prevailing wind is from the E.
What is the average temperature in Río San Juan year round?
The average temperature in Río San Juan over the whole year is 26°C. September is the hottest month, with highs of about 32°C; February is the coldest, with lows of about 21°C.