Castanhal in May
5.5out of 10
Possible, with caveats
Hot: daytime highs around 31°C. Very wet: about 28 rainy days.
31°CAvg high
23°CAvg low
28Rainy days (278 mm)
11:56 hDaylight
06:10Sunrise · 18:06 Sunset
Why this score
- Hot: daytime highs around 31°C
- Very wet: about 28 rainy days
What to wear and pack
- Light, breathable clothing
- Shorts or a light skirt
- Rain jacket or compact umbrella
- Sunscreen, sunglasses and a hat
How reliable is the forecast?
Rain in May varies a lot between years (±3.5 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 31°C | 23°C | 269 mm | 27 | – | – | 5.5 |
| February | 30°C | 23°C | 358 mm | 27 | – | – | 5.7 |
| March | 30°C | 23°C | 456 mm | 31 | – | – | 5.8 |
| April | 30°C | 23°C | 427 mm | 30 | – | – | 5.7 |
| May | 31°C | 23°C | 278 mm | 28 | – | – | 5.5 |
| June | 31°C | 22°C | 121 mm | 21 | – | – | 5.4 |
| July | 32°C | 22°C | 91 mm | 18 | – | – | 5.8 |
| August | 32°C | 22°C | 51 mm | 13 | – | – | 6.4 |
| September | 33°C | 23°C | 34 mm | 9 | – | – | 6.7 |
| October | 34°C | 23°C | 34 mm | 8 | – | – | 6.7 |
| November | 34°C | 23°C | 49 mm | 9 | – | – | 6.7 |
| December | 33°C | 23°C | 118 mm | 17 | – | – | 5.5 |
Frequently asked questions
How hot is Castanhal in May?
Daytime highs average 31°C and nights about 23°C.
When is the best time to visit Castanhal?
The best months are September, October, November, August.