Heroica Guaymas weather in December
In December, Heroica Guaymas sees average daytime highs of 23°C and overnight lows near 13°C, with 13 mm of rain across 1.5 wet days and about 10.3 hours of daylight. It is the 11th-warmest and 4th-wettest month of the year here.
Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 66% of the time in December, and the air most often feels dry.
Daylight stretches from about 10 h 24 min at the start of December to 10 h 18 min by month's end. Set against the rest of the year, December is Heroica Guaymas's 9th-clearest and 6th-windiest month. For the whole year in context, see Heroica Guaymas's year-round climate.
- Daytime high
- 23°
- 11th warmest
- Overnight low
- 13°
- 2nd coldest
- Rainfall
- 13 mm
- 1.5 wet days
- Daylight
- 10 h 12 min
- 7:13 AM – 5:27 PM
- Cloud cover
- 33%
- 9th clearest
- Wind
- 13 km/h
- 6th windiest
- Solar energy
- 3.9 kWh/m²
- Travel score
- 8.7
- out of 10
Heroica Guaymas is municipal seat of Guaymas, State of Sonora, Mexico.
- Founded
- 1701
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Highs ease over the month, from about 24°C in the first days to 22°C by the end.
A typical December day in Heroica Guaymas reaches about 23°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 26°C. Set against its neighbours, December runs about 4°C cooler than November and on par with January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg low (°C) | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 15 |
| 2 | 24 | 14 |
| 3 | 24 | 14 |
| 4 | 24 | 14 |
| 5 | 24 | 14 |
| 6 | 24 | 14 |
| 7 | 24 | 14 |
| 8 | 24 | 14 |
| 9 | 24 | 14 |
| 10 | 23 | 14 |
| 11 | 23 | 13 |
| 12 | 23 | 13 |
| 13 | 23 | 13 |
| 14 | 23 | 13 |
| 15 | 23 | 13 |
| 16 | 23 | 13 |
| 17 | 23 | 13 |
| 18 | 23 | 13 |
| 19 | 23 | 13 |
| 20 | 23 | 13 |
| 21 | 22 | 12 |
| 22 | 22 | 12 |
| 23 | 22 | 12 |
| 24 | 22 | 12 |
| 25 | 22 | 12 |
| 26 | 22 | 12 |
| 27 | 22 | 12 |
| 28 | 22 | 12 |
| 29 | 22 | 12 |
| 30 | 22 | 12 |
| 31 | 22 | 12 |
How December really feels in Heroica Guaymas
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Heroica Guaymas weather by month
How December compares with the rest of the year at a glance. December is the 11th-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 23° / 12° | 8 | 1.3 | 10.4 | 8.7 |
| Feb | 24° / 13° | 11 | 1.5 | 11 | 8.7 |
| Mar | 26° / 15° | 5 | 0.5 | 11.8 | 8.8 |
| Apr | 28° / 18° | 1 | 0.2 | 12.6 | 8.0 |
| May | 31° / 21° | 0 | 0.1 | 13.4 | 6.1 |
| Jun | 34° / 25° | 1 | 0.2 | 13.7 | 4.4 |
| Jul | 35° / 29° | 10 | 2.4 | 13.6 | 3.2 |
| Aug | 35° / 29° | 26 | 4.5 | 13 | 3.0 |
| Sep | 34° / 27° | 59 | 5.5 | 12.2 | 3.7 |
| Oct | 32° / 23° | 17 | 2.2 | 11.3 | 5.5 |
| Nov | 27° / 17° | 12 | 1.3 | 10.6 | 8.2 |
| Dec | 23° / 13° | 13 | 1.5 | 10.3 | 8.7 |
Cloud cover in December
The sky is clear or mostly clear about 66% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 8% of December, with mostly cloudy or overcast conditions the remaining 26%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 71 | 70 | 70 | 71 | 71 | 71 | 72 | 72 | 73 | 73 | 74 | 75 | 75 | 76 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 75 |
| Cloudier (%) | 29 | 30 | 30 | 29 | 29 | 29 | 28 | 28 | 27 | 27 | 26 | 25 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 71 | 29 |
| 2 | 70 | 30 |
| 3 | 70 | 30 |
| 4 | 71 | 29 |
| 5 | 71 | 29 |
| 6 | 71 | 29 |
| 7 | 72 | 28 |
| 8 | 72 | 28 |
| 9 | 73 | 27 |
| 10 | 73 | 27 |
| 11 | 74 | 26 |
| 12 | 75 | 25 |
| 13 | 75 | 25 |
| 14 | 76 | 24 |
| 15 | 77 | 23 |
| 16 | 77 | 23 |
| 17 | 77 | 23 |
| 18 | 77 | 23 |
| 19 | 77 | 23 |
| 20 | 77 | 23 |
| 21 | 77 | 23 |
| 22 | 77 | 23 |
| 23 | 77 | 23 |
| 24 | 75 | 25 |
| 25 | 75 | 25 |
| 26 | 75 | 25 |
| 27 | 75 | 25 |
| 28 | 75 | 25 |
| 29 | 75 | 25 |
| 30 | 75 | 25 |
| 31 | 75 | 25 |
Chance of precipitation in December
Heroica Guaymas gets around 13 mm of rain over 1.5 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 5% and peaks near 6% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 |
| Rain chance (%) | |
|---|---|
| 1 | 6 |
| 2 | 6 |
| 3 | 6 |
| 4 | 6 |
| 5 | 6 |
| 6 | 6 |
| 7 | 6 |
| 8 | 6 |
| 9 | 5 |
| 10 | 5 |
| 11 | 5 |
| 12 | 5 |
| 13 | 5 |
| 14 | 5 |
| 15 | 5 |
| 16 | 5 |
| 17 | 5 |
| 18 | 5 |
| 19 | 5 |
| 20 | 5 |
| 21 | 5 |
| 22 | 5 |
| 23 | 4 |
| 24 | 4 |
| 25 | 4 |
| 26 | 4 |
| 27 | 4 |
| 28 | 4 |
| 29 | 4 |
| 30 | 4 |
| 31 | 5 |
Humidity in December
Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the dry band about 74% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 57 | 59 | 60 | 61 | 62 | 63 | 63 | 66 | 66 | 68 | 68 | 70 | 72 | 72 | 74 | 75 | 77 | 78 | 80 | 81 | 82 | 84 | 84 | 85 | 85 | 85 | 85 | 85 | 85 | 85 | 85 |
| Comfortable (%) | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 24 | 24 | 23 | 23 | 22 | 21 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Humid (%) | 15 | 14 | 13 | 13 | 12 | 11 | 11 | 10 | 10 | 9 | 9 | 8 | 7 | 7 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Muggy (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 57 | 27 | 15 | 1 |
| 2 | 59 | 26 | 14 | 1 |
| 3 | 60 | 26 | 13 | 1 |
| 4 | 61 | 25 | 13 | 1 |
| 5 | 62 | 25 | 12 | 1 |
| 6 | 63 | 25 | 11 | 1 |
| 7 | 63 | 25 | 11 | 1 |
| 8 | 66 | 24 | 10 | 0 |
| 9 | 66 | 24 | 10 | 0 |
| 10 | 68 | 23 | 9 | 0 |
| 11 | 68 | 23 | 9 | 0 |
| 12 | 70 | 22 | 8 | 0 |
| 13 | 72 | 21 | 7 | 0 |
| 14 | 72 | 21 | 7 | 0 |
| 15 | 74 | 20 | 6 | 0 |
| 16 | 75 | 19 | 6 | 0 |
| 17 | 77 | 18 | 5 | 0 |
| 18 | 78 | 17 | 5 | 0 |
| 19 | 80 | 16 | 4 | 0 |
| 20 | 81 | 15 | 4 | 0 |
| 21 | 82 | 14 | 4 | 0 |
| 22 | 84 | 13 | 3 | 0 |
| 23 | 84 | 13 | 3 | 0 |
| 24 | 85 | 12 | 3 | 0 |
| 25 | 85 | 12 | 3 | 0 |
| 26 | 85 | 12 | 3 | 0 |
| 27 | 85 | 12 | 3 | 0 |
| 28 | 85 | 12 | 3 | 0 |
| 29 | 85 | 12 | 3 | 0 |
| 30 | 85 | 12 | 3 | 0 |
| 31 | 85 | 12 | 3 | 0 |
Wind in December
Winds average 13 km/h in December.
Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 12 | light breeze |
| 2 | 12 | light breeze |
| 3 | 12 | light breeze |
| 4 | 12 | light breeze |
| 5 | 12 | light breeze |
| 6 | 12 | light breeze |
| 7 | 12 | light breeze |
| 8 | 12 | light breeze |
| 9 | 13 | light breeze |
| 10 | 13 | light breeze |
| 11 | 13 | light breeze |
| 12 | 13 | light breeze |
| 13 | 13 | light breeze |
| 14 | 13 | light breeze |
| 15 | 13 | light breeze |
| 16 | 13 | light breeze |
| 17 | 13 | light breeze |
| 18 | 13 | light breeze |
| 19 | 13 | light breeze |
| 20 | 13 | light breeze |
| 21 | 13 | light breeze |
| 22 | 13 | light breeze |
| 23 | 13 | light breeze |
| 24 | 13 | light breeze |
| 25 | 13 | light breeze |
| 26 | 13 | light breeze |
| 27 | 13 | light breeze |
| 28 | 13 | light breeze |
| 29 | 13 | light breeze |
| 30 | 13 | light breeze |
| 31 | 13 | light breeze |
Sunrise & sunset in December
Daylight runs from about 10 h 24 min at the start of December to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 6 minutes over December. Sunrise moves from 7:03 AM to 7:19 AM, and sunset from 5:24 PM to 5:34 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 10.4 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.2 | 10.3 |
| Sunrise (AM) | 7:03 | 7:03 | 7:04 | 7:05 | 7:05 | 7:06 | 7:07 | 7:08 | 7:08 | 7:09 | 7:10 | 7:10 | 7:11 | 7:11 | 7:12 | 7:13 | 7:13 | 7:14 | 7:14 | 7:15 | 7:15 | 7:16 | 7:16 | 7:17 | 7:17 | 7:17 | 7:18 | 7:18 | 7:19 | 7:19 | 7:19 |
| Sunset (PM) | 5:24 | 5:24 | 5:24 | 5:24 | 5:24 | 5:24 | 5:25 | 5:25 | 5:25 | 5:25 | 5:25 | 5:26 | 5:26 | 5:26 | 5:27 | 5:27 | 5:27 | 5:28 | 5:28 | 5:29 | 5:29 | 5:29 | 5:30 | 5:30 | 5:31 | 5:31 | 5:32 | 5:33 | 5:33 | 5:34 | 5:34 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.4 | 7:03 | 5:24 |
| 2 | 10.3 | 7:03 | 5:24 |
| 3 | 10.3 | 7:04 | 5:24 |
| 4 | 10.3 | 7:05 | 5:24 |
| 5 | 10.3 | 7:05 | 5:24 |
| 6 | 10.3 | 7:06 | 5:24 |
| 7 | 10.3 | 7:07 | 5:25 |
| 8 | 10.3 | 7:08 | 5:25 |
| 9 | 10.3 | 7:08 | 5:25 |
| 10 | 10.3 | 7:09 | 5:25 |
| 11 | 10.3 | 7:10 | 5:25 |
| 12 | 10.3 | 7:10 | 5:26 |
| 13 | 10.3 | 7:11 | 5:26 |
| 14 | 10.2 | 7:11 | 5:26 |
| 15 | 10.2 | 7:12 | 5:27 |
| 16 | 10.2 | 7:13 | 5:27 |
| 17 | 10.2 | 7:13 | 5:27 |
| 18 | 10.2 | 7:14 | 5:28 |
| 19 | 10.2 | 7:14 | 5:28 |
| 20 | 10.2 | 7:15 | 5:29 |
| 21 | 10.2 | 7:15 | 5:29 |
| 22 | 10.2 | 7:16 | 5:29 |
| 23 | 10.2 | 7:16 | 5:30 |
| 24 | 10.2 | 7:17 | 5:30 |
| 25 | 10.2 | 7:17 | 5:31 |
| 26 | 10.2 | 7:17 | 5:31 |
| 27 | 10.2 | 7:18 | 5:32 |
| 28 | 10.2 | 7:18 | 5:33 |
| 29 | 10.2 | 7:19 | 5:33 |
| 30 | 10.2 | 7:19 | 5:34 |
| 31 | 10.3 | 7:19 | 5:34 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 3.9 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 3.9 kWh/m² to a high of 8.14 kWh/m² in May across the year — December's 3.9 kWh/m² sits near the bottom.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.0 | 4.0 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 3.9 | 4.0 | 4.0 | 4.0 | 4.0 | 4.0 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.0 | Moderate |
| 2 | 4.0 | Moderate |
| 3 | 3.9 | Moderate |
| 4 | 3.9 | Moderate |
| 5 | 3.9 | Moderate |
| 6 | 3.9 | Moderate |
| 7 | 3.9 | Moderate |
| 8 | 3.9 | Moderate |
| 9 | 3.9 | Moderate |
| 10 | 3.9 | Moderate |
| 11 | 3.9 | Moderate |
| 12 | 3.9 | Moderate |
| 13 | 3.9 | Moderate |
| 14 | 3.9 | Moderate |
| 15 | 3.9 | Moderate |
| 16 | 3.9 | Moderate |
| 17 | 3.9 | Moderate |
| 18 | 3.9 | Moderate |
| 19 | 3.9 | Moderate |
| 20 | 3.9 | Moderate |
| 21 | 3.9 | Moderate |
| 22 | 3.9 | Moderate |
| 23 | 3.9 | Moderate |
| 24 | 3.9 | Moderate |
| 25 | 3.9 | Moderate |
| 26 | 3.9 | Moderate |
| 27 | 4.0 | Moderate |
| 28 | 4.0 | Moderate |
| 29 | 4.0 | Moderate |
| 30 | 4.0 | Bright |
| 31 | 4.0 | Bright |
Hazard calendar for Heroica Guaymas
None of Heroica Guaymas's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Heroica Guaymas sits in the eastern Pacific hurricane zone; the season peaks August–September.
Is December a good time to visit Heroica Guaymas?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is one of the better times to visit Heroica Guaymas for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Heroica Guaymas in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Heroica Guaymas sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes.
Sea temperature near Heroica Guaymas in December
The nearest coast averages about 20°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 30°C and coldest in January near 18°C.
It's comfortable for a long swim from Apr 6 to Dec 15 — about 8.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 18 | 18 | 19 | 21 | 24 | 27 | 29 | 30 | 30 | 28 | 23 | 20 |
| Comfort | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Tropical | Tropical | Tropical | Warm | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 18 | Cool |
| Feb | 18 | Cool |
| Mar | 19 | Cool |
| Apr | 21 | Refreshing |
| May | 24 | Refreshing |
| Jun | 27 | Warm |
| Jul | 29 | Tropical |
| Aug | 30 | Tropical |
| Sep | 30 | Tropical |
| Oct | 28 | Warm |
| Nov | 23 | Refreshing |
| Dec | 20 | Cool |
UV index in Heroica Guaymas in December
Clear-sky midday UV in December peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Heroica Guaymas peaks around July 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 5 | 6 | 8 | 10 | 10 | 12 | 12 | 11 | 10 | 7 | 6 | 4 |
| Level | Moderate | High | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 6 | High |
| Mar | 8 | Very high |
| Apr | 10 | Extreme |
| May | 10 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 7 | Very high |
| Nov | 6 | High |
| Dec | 4 | Moderate |
Air quality in Heroica Guaymas in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Heroica Guaymas is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.9× the cleanest month (January, 5 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 5 | 5 | 5 | 6 | 5 | 8 | 18 | 13 | 8 | 5 | 5 | 5 |
| Level | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 5 | Good |
| Feb | 5 | Good |
| Mar | 5 | Good |
| Apr | 6 | Good |
| May | 5 | Good |
| Jun | 8 | Good |
| Jul | 18 | Moderate |
| Aug | 13 | Moderate |
| Sep | 8 | Good |
| Oct | 5 | Good |
| Nov | 5 | Good |
| Dec | 5 | Good |
Where is Heroica Guaymas?
Heroica Guaymas sits at 27.9°N, 110.9°W, 18 m above sea level, in Mexico. The nearest listed city is Empalme, 10 km away.
Topography around Heroica Guaymas
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Heroica Guaymas.
Within 3 km, the terrain around Heroica Guaymas has significant variations in elevation — a maximum elevation change of 469 m around an average of 58 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 469 m; within 80 km, large variations in elevation — a maximum elevation change of 1,146 m.
The land around Heroica Guaymas is covered by shrubs (40%) and artificial surfaces (33%) within 3 km, water (51%) and shrubs (34%) within 16 km, and shrubs (50%) and water (38%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Heroica Guaymas (27.9199°, -110.8989°, elevation 18 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).