Last updated: March 2, 2024
The weather in Saint Johnsbury, United States, during May is characterized by an average temperature of 12°C (55°F). Highs can soar to 29°C (85°F), while lows may dip to 0°C (32°F). Typically, the humidity level in Saint Johnsbury throughout May hovers around 78%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In May, Saint Johnsbury averages 95 mm (3.7 inches) of rainfall, typically over the course of 12 rainy days. The month enjoys an average of 14 hours 48 minutes of daylight, with the sun shining for approximately 8 hours 15 minutes each day. Additionally, there is a 32% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In May, the UV Index in Saint Johnsbury reaches a maximum of 9, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 2 | 4 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 3 | 1 | 1 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||