Hermosillo, Mexico experiences average highs of 33°C (91°F) and lows of 18°C (64°F) throughout the year. The climate is relatively dry, with only 2 rainy days per month on average. Sunshine is abundant, averaging about 11 hours per day. Average highs have stayed broadly stable across the available records.
Hermosillo, Mexico Weather & Climate 2026
Monthly climate averages for Hermosillo, Mexico. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Jun–Sep At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.3/10
Best: February, March, April, May, November
UV Index
7
High
Temperature 33°C / 18°C
Feels Like 32°C / 18°C
Rainy Days 2
Rainfall 16 mm
Sunshine 11 h
Humidity 42%
Wind Speed 17 km/h
Dew Point 11°C
Hottest Month
40°C
June
Avg Low24°C
Rain2days
Coldest Month
9°C
January
Avg High24°C
Rain1days
Driest Month
0days
April
Avg High33°C
Avg Low16°C
Windiest Month
20 km/h
May (Gusts 42)
Worst Time to Visit
Consider avoiding July, August, September due to extreme heat, oppressive humidity.
Sun Position
Sunrise 05:26
Daylight 14h
Sunset 19:25
Live conditions—
Hermosillo on the map · live conditions
Hermosillo, Mexico
- Continent
- Americas
- Country
- Mexico
- City
- Hermosillo
- Population
- 812.2K
- Coordinates
- 29.09°, -110.97°
Seasonal Breakdown
Spring
Mar–May
Avg High 32°C
Avg Low 15°C
Rain 0 days/mo
3/3 best months
Summer
Jun–Aug
Avg High 39°C
Avg Low 26°C
Rain 6 days/mo
Autumn
Sep–Nov
Avg High 34°C
Avg Low 20°C
Rain 3 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 25°C
Avg Low 10°C
Rain 1 days/mo
1/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 24°C / 9°C . Feb: 26°C / 11°C . Mar: 29°C / 13°C . Apr: 33°C / 16°C . May: 35°C / 18°C . Jun: 40°C / 24°C . Jul: 39°C / 27°C . Aug: 39°C / 27°C . Sep: 37°C / 25°C . Oct: 35°C / 20°C . Nov: 29°C / 15°C . Dec: 25°C / 11°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 9 mm. Feb: 9 mm. Mar: 7 mm. Apr: 0 mm. May: 0 mm. Jun: 5 mm. Jul: 33 mm. Aug: 51 mm. Sep: 47 mm. Oct: 14 mm. Nov: 8 mm. Dec: 11 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 46%. Feb: 41%. Mar: 35%. Apr: 27%. May: 28%. Jun: 33%. Jul: 48%. Aug: 54%. Sep: 56%. Oct: 43%. Nov: 41%. Dec: 47%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 14 km/h . Feb: 16 km/h . Mar: 18 km/h . Apr: 20 km/h . May: 20 km/h . Jun: 20 km/h . Jul: 18 km/h . Aug: 16 km/h . Sep: 16 km/h . Oct: 15 km/h . Nov: 14 km/h . Dec: 13 km/h .
Sunshine
Sunshine
Sunshine: Jan: 9h. Feb: 10h. Mar: 11h. Apr: 12h. May: 13h. Jun: 13h. Jul: 12h. Aug: 12h. Sep: 11h. Oct: 10h. Nov: 10h. Dec: 9h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 5. Feb: UV 6. Mar: UV 7. Apr: UV 8. May: UV 9. Jun: UV 9. Jul: UV 9. Aug: UV 9. Sep: UV 8. Oct: UV 7. Nov: UV 5. Dec: UV 5.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 40°C | Jun · 40°C |
| Coldest month | Jan 2025 · 8°C | Jan · 9°C |
| Wettest month | Sep 2025 · 116 mm | Aug · 51 mm |
| Windiest month | May 2025 · 21 km/h | May · 20 km/h |
Month-by-Month Weather Table
January
Good 
February best
Excellent March best
Excellent April best
Excellent May best
Excellent June
Fair July
Poor August
Poor September
Poor October
Excellent November best
Excellent December
Excellent | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 24°C / 9°C | 21°C / 6°C | 1days (9 mm) Excellent | 9.2h Good | 46% Moderate | 4.8 Moderate | Good | View Details |
| February best | 26°C / 11°C | 23°C / 8°C | 1days (9 mm) Excellent | 9.8h Good | 41% Moderate | 6 High | Excellent | View Details |
| March best | 29°C / 13°C | 26°C / 10°C | 1days (7 mm) Excellent | 10.6h Excellent | 35% Comfortable | 7.3 Very High | Excellent | View Details |
| April best | 33°C / 16°C | 30°C / 13°C | 0days (0 mm) Excellent | 11.9h Excellent | 27% Comfortable | 8.4 Very High | Excellent | View Details |
| May best | 35°C / 18°C | 33°C / 16°C | 0days (0 mm) Excellent | 12.7h Excellent | 28% Comfortable | 8.8 Very High | Excellent | View Details |
| June | 40°C / 24°C | 39°C / 24°C | 2days (5 mm) Excellent | 12.8h Excellent | 33% Comfortable | 8.9 Very High | Fair | View Details |
| July | 39°C / 27°C | 42°C / 31°C | 7days (33 mm) Good | 12.4h Excellent | 48% Moderate | 8.9 Very High | Poor | View Details |
| August | 39°C / 27°C | 42°C / 31°C | 8days (51 mm) Wet | 11.7h Excellent | 54% Moderate | 8.6 Very High | Poor | View Details |
| September | 37°C / 25°C | 39°C / 28°C | 6days (47 mm) Good | 10.9h Excellent | 56% Moderate | 7.7 Very High | Poor | View Details |
| October | 35°C / 20°C | 34°C / 20°C | 1days (14 mm) Excellent | 10.3h Excellent | 43% Moderate | 6.5 High | Excellent | View Details |
| November best | 29°C / 15°C | 27°C / 13°C | 1days (8 mm) Excellent | 9.5h Good | 41% Moderate | 5.1 High | Excellent | View Details |
| December | 25°C / 11°C | 22°C / 8°C | 1days (11 mm) Excellent | 8.8h Good | 47% Moderate | 4.5 Moderate | Excellent | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Hermosillo are February, March, April, May, November, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Hermosillo, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Hermosillo is June, with average daytime highs of 40°C (103°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Hermosillo is January, with average overnight lows of 9°C (49°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Hermosillo is August, averaging 51mm of precipitation across 8 rainy days. An umbrella or waterproof jacket is essential.
Hermosillo receives approximately 131 sunshine hours per year. The sunniest month is June with around 13 hours. Based on climate data for Hermosillo.
The least favorable months to visit Hermosillo are July, August, September, primarily due to extreme heat, oppressive humidity. For the best conditions, consider February, March, April, May, November instead.
The annual average UV index in Hermosillo is 7, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Hermosillo is 42%, classified as dry. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Average wind speeds in Hermosillo are 17 km/h (11 mph). The windiest month is May with peak winds reaching 20 km/h (13 mph) (gusts up to 42 km/h / 26 mph).
Hermosillo averages 16 clear-sky days per month with overall cloud cover around 29%. The clearest skies occur in May.
The annual average dew point in Hermosillo is 11°C (52°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Hermosillo has a Hot Desert climate, classified as BWh under the Köppen system. Arid climates have very low rainfall relative to temperature, with large swings between daytime heat and cool nights.
The 'feels like' temperature in Hermosillo ranges from 18°C (64°F) to 32°C (90°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
June is not the best time to visit Hermosillo, with a climate score of 5.8/10. Consider visiting during February, March, April, May, November instead for better conditions.
For June in Hermosillo, pack Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Sandals. With average highs of 40°C (103°F) and 2 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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