San Juan
May
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.
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14
Dry days
17
Rainy days
0
Snow days
32°/23°
Temperatures
19 km/h
Avg max wind
77 %
Avg humidity
San Juan in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2 31° | 3  31° | 4  30° | |||
| 5 30° | 6 30° | 7 31° | 8 30° | 9 30° | 10 30° | 11 32° |
| 12 31° | 13 31° | 14 30° | 15 32° | 16 30° | 17 31° | 18  31° |
| 19  31° | 20 31° | 21 31° | 22 29° | 23 28° | 24 31° | 25 30° |
| 26 31° | 27 31° | 28 30° | 29 31° | 30 31° | 31 32° |
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Temperatures trend during May in San Juan
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Patchy rain possible | 29° /23° | 5 mm | 7 | |
| 2 May | Patchy rain possible | 31° /23° | 1 mm | 7 | |
| 3 May | Partly cloudy | 31° /23° | 3.3 mm | 7 | |
| 4 May | Cloudy | 30° /23° | 8.6 mm | 7 | |
| 5 May | Patchy rain possible | 30° /23° | 7.4 mm | 7 | |
| 6 May | Cloudy | 30° /23° | 8.3 mm | 7 | |
| 7 May | Cloudy | 31° /22° | 13.4 mm | 7 | |
| 8 May | Patchy rain possible | 30° /22° | 4.4 mm | 7 | |
| 9 May | Patchy rain possible | 30° /23° | 7.1 mm | 7 | |
| 10 May | Cloudy | 30° /23° | 5 mm | 7 | |
| 11 May | Cloudy | 32° /23° | 2.1 mm | 7 | |
| 12 May | Patchy rain possible | 31° /22° | 1.8 mm | 7 | |
| 13 May | Patchy rain possible | 31° /23° | 0.6 mm | 7 | |
| 14 May | Patchy rain possible | 30° /23° | 0.3 mm | 7 | |
| 15 May | Partly cloudy | 32° /24° | 0.3 mm | 7 | |
| 16 May | Patchy rain possible | 30° /23° | 1.6 mm | 7 | |
| 17 May | Patchy rain possible | 31° /24° | 1.1 mm | 7 | |
| 18 May | Overcast | 31° /23° | 2.7 mm | 7 | |
| 19 May | Moderate or heavy rain shower | 31° /24° | 8.2 mm | 7 | |
| 20 May | Moderate or heavy rain shower | 31° /24° | 5.4 mm | 7 | |
| 21 May | Moderate rain at times | 31° /24° | 2.2 mm | 7 | |
| 22 May | Moderate or heavy rain shower | 29° /23° | 19 mm | 7 | |
| 23 May | Moderate or heavy rain shower | 28° /23° | 12.7 mm | 7 | |
| 24 May | Moderate or heavy rain shower | 31° /23° | 7.9 mm | 7 | |
| 25 May | Moderate or heavy rain shower | 30° /23° | 3.5 mm | 7 | |
| 26 May | Moderate rain at times | 31° /24° | 1.3 mm | 7 | |
| 27 May | Patchy rain possible | 31° /24° | 7.8 mm | 7 | |
| 28 May | Overcast | 30° /24° | 3.5 mm | 7 | |
| 29 May | Cloudy | 31° /24° | 1.4 mm | 7 | |
| 30 May | Patchy rain possible | 31° /24° | 2.7 mm | 7 | |
| 31 May | 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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