Climate averages 1991–2020
Heroica Guaymas weather
in December.
A warm, very dry month: the 11th warmest and the joint 8th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Heroica Guaymas: daytime highs average 22.0°C and nights cool to about 13.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 12 mm of rain on roughly 2 days, which makes December a very dry month (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 25 min on an average December day.
The nearest other city in this atlas is Ciudad Obregón (106 km away). In December its highs average 25.5°C, 3.5°C warmer than Heroica Guaymas, with 17 mm of rain.
Among the 153 cities listed in Mexico, Heroica Guaymas ranks joint 81st of 153 for the warmest December highs and joint 76th of 153 for the driest December (rainfall, lowest first). The mean December high of those 153 cities is 22.7°C; Heroica Guaymas is 0.7°C cooler than that mean.
From December to January, average highs fall by 0.1°C to 21.9°C, and monthly rainfall falls from 12 mm to 8.4 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Heroica Guaymas climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 21.9°C12.8°C | 12.8°C | 8.4 | 1.3 | 10.611 h |
| February | 22.6°C13.5°C | 13.5°C | 11 | 1.5 | 11.211 h |
| March | 24.7°C15.2°C | 15.2°C | 5.4 | 0.5 | 12.012 h |
| April | 27.0°C17.6°C | 17.6°C | 1.3 | 0.2 | 12.813 h |
| May | 29.8°C20.8°C | 20.8°C | 0.3 | 0.1 | 13.514 h |
| June | 32.7°C25.1°C | 25.1°C | 1.2 | 0.2 | 13.914 h |
| July | 33.8°C28.1°C | 28.1°C | 9.8 | 2.4 | 13.714 h |
| August | 33.9°C28.5°C | 28.5°C | 26 | 4.5 | 13.113 h |
| September | 32.7°C27.0°C | 27.0°C | 59 | 5.5 | 12.312 h |
| October | 30.6°C22.8°C | 22.8°C | 17 | 2.2 | 11.512 h |
| November | 26.1°C17.5°C | 17.5°C | 12 | 1.3 | 10.811 h |
| December, selected | 22.0°C13.5°C | 13.5°C | 12 | 1.5 | 10.410 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Ciudad Obregón in DecemberMexico · 106 kmHigh 25.5°C · Low 11.0°C · 17 mm rain
- Hermosillo in DecemberMexico · 130 kmHigh 23.1°C · Low 9.4°C · 19 mm rain
- Navojoa in DecemberMexico · 172 kmHigh 26.1°C · Low 11.3°C · 18 mm rain
- Los Mochis in DecemberMexico · 303 kmHigh 25.8°C · Low 14.2°C · 12 mm rain
- Guasave in DecemberMexico · 356 kmHigh 27.0°C · Low 13.4°C · 15 mm rain
- Nogales in DecemberMexico · 377 kmHigh 15.8°C · Low 2.1°C · 37 mm rain
- Guamúchil in DecemberMexico · 392 kmHigh 27.3°C · Low 12.8°C · 22 mm rain
- Cuauhtémoc in DecemberMexico · 399 kmHigh 14.7°C · Low 1.2°C · 10 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Heroica Guaymas) is explained once on the Heroica Guaymas year overview and on the Sources, method and limits page.