Last updated: June 24, 2025
In January, the average temperature in Barstow Heights, United States is a mild 9°C (49°F), with daily variations ranging from a chilly -2°C (29°F) to a warm 23°C (74°F). Expect some drizzle, as the region sees an average precipitation of 21 mm (0.8 in) over 4 days. Keep in mind, the average humidity hovers around a comfortable 76%, creating a refreshing atmosphere!
In January in Barstow Heights, the average temperature is 9°C (49°F). Maximums can reach 23°C (74°F), and minimums can drop as low as -2°C (29°F). Travelers should be prepared for varying weather conditions, ranging from mild to chilly.
In Barstow Heights in January, the precipitation amount is 21 mm (0.8 in) over a span of 4 days.
In Barstow Heights in January, humidity is 76%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making outdoor adventures a bit uncomfortable as the dampness seeps into your clothes and lingers in the air, often leading to a sense of coolness that can be refreshing but also dampens the joy of exploration.
In Barstow Heights in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Barstow Heights for better planning.
UV Risk Categories
Weather in Barstow Heights varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Barstow Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 9°C (49°F) | 21 mm (0.8 inches) | 76% | moderate |
| February Weather | 10°C (51°F) | 18 mm (0.7 inches) | 80% | high |
| March Weather | 13°C (56°F) | 18 mm (0.7 inches) | 69% | very high |
| April Weather | 18°C (64°F) | 12 mm (0.5 inches) | 57% | very high |
| May Weather | 21°C (70°F) | 4 mm (0.2 inches) | 45% | extreme |
| June Weather | 27°C (81°F) | 1 mm (0.1 inches) | 34% | extreme |
| July Weather | 30°C (87°F) | 6 mm (0.2 inches) | 29% | extreme |
| August Weather | 30°C (86°F) | 5 mm (0.2 inches) | 28% | extreme |
| September Weather | 26°C (79°F) | 2 mm (0.1 inches) | 41% | very high |
| October Weather | 19°C (66°F) | 4 mm (0.2 inches) | 54% | very high |
| November Weather | 14°C (57°F) | 7 mm (0.3 inches) | 68% | moderate |
| December Weather | 9°C (48°F) | 23 mm (0.9 inches) | 75% | moderate |