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Weather in San Juan for May 2025

Your guide to San Juan weather in May - trends and predictions
  • In general, the average temperature in San Juan at the beginning of May is 30.3 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 30.9 °C by the end of May.

  • Expect significant rainfall in San Juan during May, with an average of 17 rainy days.

  • Is May a good time to visit San Juan? check out the best time to travel to San Juan page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
14
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/23°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
77 %
Avg humidity

San Juan in May average weather

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Temperatures trend during May in San Juan

See the weather trend as well as the moving average line
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May weather day by day

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Date Weather Temperatures Rain UV More
1 May Patchy rain possible
Patchy rain possible
29° /23° 5 mm 7
2 May Patchy rain possible
Patchy rain possible
31° /23° 1 mm 7
3 May Partly cloudy
Partly cloudy
31° /23° 3.3 mm 7
4 May Cloudy
Cloudy
30° /23° 8.6 mm 7
5 May Patchy rain possible
Patchy rain possible
30° /23° 7.4 mm 7
6 May Cloudy
Cloudy
30° /23° 8.3 mm 7
7 May Cloudy
Cloudy
31° /22° 13.4 mm 7
8 May Patchy rain possible
Patchy rain possible
30° /22° 4.4 mm 7
9 May Patchy rain possible
Patchy rain possible
30° /23° 7.1 mm 7
10 May Cloudy
Cloudy
30° /23° 5 mm 7
11 May Cloudy
Cloudy
32° /23° 2.1 mm 7
12 May Patchy rain possible
Patchy rain possible
31° /22° 1.8 mm 7
13 May Patchy rain possible
Patchy rain possible
31° /23° 0.6 mm 7
14 May Patchy rain possible
Patchy rain possible
30° /23° 0.3 mm 7
15 May Partly cloudy
Partly cloudy
32° /24° 0.3 mm 7
16 May Patchy rain possible
Patchy rain possible
30° /23° 1.6 mm 7
17 May Patchy rain possible
Patchy rain possible
31° /24° 1.1 mm 7
18 May Overcast
Overcast
31° /23° 2.7 mm 7
19 May Moderate or heavy rain shower
Moderate or heavy rain shower
31° /24° 8.2 mm 7
20 May Moderate or heavy rain shower
Moderate or heavy rain shower
31° /24° 5.4 mm 7
21 May Moderate rain at times
Moderate rain at times
31° /24° 2.2 mm 7
22 May Moderate or heavy rain shower
Moderate or heavy rain shower
29° /23° 19 mm 7
23 May Moderate or heavy rain shower
Moderate or heavy rain shower
28° /23° 12.7 mm 7
24 May Moderate or heavy rain shower
Moderate or heavy rain shower
31° /23° 7.9 mm 7
25 May Moderate or heavy rain shower
Moderate or heavy rain shower
30° /23° 3.5 mm 7
26 May Moderate rain at times
Moderate rain at times
31° /24° 1.3 mm 7
27 May Patchy rain possible
Patchy rain possible
31° /24° 7.8 mm 7
28 May Overcast
Overcast
30° /24° 3.5 mm 7
29 May Cloudy
Cloudy
31° /24° 1.4 mm 7
30 May Patchy rain possible
Patchy rain possible
31° /24° 2.7 mm 7
31 May Patchy rain possible
Patchy rain possible
32° /24° 1.1 mm 7
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Important Notice
Our weather forecast for San Juan in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the San Juan forecast closer to your planned date for the most up-to-date weather information.

San Juan in May - FAQ

What are the expected maximum and minimum temperatures in San Juan during May?
During May, expect a variety of temperatures with highs around 32° and lows near 23°, suitable for diverse activities and preferences.
How much rainfall should be expected in San Juan during May?
Significant rainfall exceeding 267.7 mm is expected in San Juan during May, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in San Juan during May?
The average wind speed in San Juan during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to San Juan in May?

As you prepare for your trip to San Juan in May, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in San Juan, during May, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
    • Sandals/Flip-flops: Comfortable for warm climates
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips
    • Insect Repellent: For destinations with mosquitos or other insects
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Location coordinates Where is San Juan?

Get accurate weather forecasts for San Juan, located at latitude 18.466 and longitude -66.106. Stay updated with localized weather information tailored for San Juan.

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