Monrovia weather in December
December in Monrovia: sweltering, rainy, with very humid — one of the best months to visit.
#2 of 12 months in Monrovia · #332 of 604 destinations to visit in December · comfort 68/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Monrovia climate normals — December
| Daytime high | 30°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 99 mm / 3.9 in | 🌧 rainy |
| Rainy days | 22 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 10.4 h/day | |
| Daylight | 11.8 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 92 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Monrovia in December — FAQ
- Is December a good time to visit Monrovia?
- December in Monrovia: sweltering, rainy, with very humid — one of the best months to visit. It ranks #2 of 12 months for Monrovia on SeasonMap's comfort score (68/100).
- What is the weather like in Monrovia in December?
- In December, Monrovia averages a daily high of 29.6°C and a low of 24.1°C, with about 99.2 mm of rain over roughly 22.4 rainy days.
- What is the air quality in Monrovia in December?
- Monrovia has a mean US Air Quality Index of about 92 in December.