Last updated: June 24, 2025
In East Merrimack, United States, the average temperature in September is a pleasant 19°C (66°F), with minimum temperatures dipping to 3°C (37°F) and soaring to a maximum of 34°C (94°F). During this time, expect around 77 mm (3.0 in) of precipitation spread over 8 days, contributing to an average humidity of 71%. Enjoy the balance of warmth and refreshing rain!
In September in East Merrimack, the average temperature is 19°C (66°F). Maximum temperatures can reach up to 34°C (94°F), while minimums can drop as low as 3°C (37°F). It's a great time to visit for a mix of warm days and cool evenings.
In East Merrimack in September, the precipitation amount is 77 mm (3.0 in) distributed over 8 days.
In East Merrimack in September humidity is 71%. With an average temperature of 19°C (66°F), this humidity feels like a warm, balmy embrace that enhances the tropical atmosphere, making it a perfect backdrop for leisurely strolls and outdoor adventures, though it may also lead to a slightly sticky feeling as you explore.
In East Merrimack in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in East Merrimack.
UV Risk Categories
Weather in East Merrimack varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in East Merrimack, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 71 mm (2.8 inches) | 86% | moderate |
| February Weather | -1°C (31°F) | 84 mm (3.3 inches) | 84% | moderate |
| March Weather | 2°C (37°F) | 82 mm (3.2 inches) | 82% | moderate |
| April Weather | 9°C (48°F) | 126 mm (5.0 inches) | 80% | very high |
| May Weather | 15°C (59°F) | 81 mm (3.2 inches) | 72% | very high |
| June Weather | 20°C (69°F) | 85 mm (3.3 inches) | 72% | very high |
| July Weather | 23°C (74°F) | 136 mm (5.4 inches) | 67% | very high |
| August Weather | 23°C (73°F) | 85 mm (3.4 inches) | 66% | very high |
| September Weather | 19°C (66°F) | 77 mm (3.0 inches) | 71% | high |
| October Weather | 12°C (55°F) | 128 mm (5.0 inches) | 78% | high |
| November Weather | 5°C (41°F) | 98 mm (3.9 inches) | 84% | moderate |
| December Weather | 0°C (32°F) | 120 mm (4.7 inches) | 81% | low |