Siltepec, Mexico experiences average highs of 25°C (77°F) and lows of 16°C (61°F) throughout the year. Rainfall is frequent, averaging about 18 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. Average highs have stayed broadly stable across the available records.
Siltepec, Mexico Weather & Climate 2026
Monthly climate averages for Siltepec, Mexico. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: May–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
8/10
Best: January, February, December
UV Index
8
High
Temperature 25°C / 16°C
Feels Like 27°C / 17°C
Rainy Days 18
Rainfall 169 mm
Sunshine 10 h
Humidity 75%
Wind Speed 6 km/h
Dew Point 16°C
Hottest Month
28°C
April
Avg Low 17°C
Rain 16 days
Coldest Month
14°C
January
Avg High 24°C
Rain 4 days
Driest Month
4 days
January
Avg High 24°C
Avg Low 14°C
Windiest Month
7 km/h
January (Gusts 35)
Worst Time to Visit
Consider avoiding May, June, July, August due to heavy rainfall.
Sun Position
Sunrise 05:46
Daylight 13h
Sunset 18:44
Live conditions —
Siltepec on the map · live conditions
Siltepec, Mexico
- Continent
- Americas
- Country
- Mexico
- City
- Siltepec
- Population
- 3.4K
- Coordinates
- 15.56°, -92.32°
Seasonal Breakdown
Spring
Mar–May
Avg High 27°C
Avg Low 17°C
Rain 17 days/mo
Summer
Jun–Aug
Avg High 25°C
Avg Low 17°C
Rain 27 days/mo
Autumn
Sep–Nov
Avg High 24°C
Avg Low 16°C
Rain 21 days/mo
Winter
Dec–Feb
Avg High 25°C
Avg Low 14°C
Rain 4 days/mo
3/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 24°C / 14°C . Feb: 26°C / 14°C . Mar: 28°C / 16°C . Apr: 28°C / 17°C . May: 27°C / 18°C . Jun: 24°C / 17°C . Jul: 25°C / 16°C . Aug: 25°C / 17°C . Sep: 24°C / 17°C . Oct: 24°C / 16°C . Nov: 23°C / 15°C . Dec: 24°C / 14°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 13 mm. Feb: 14 mm. Mar: 26 mm. Apr: 66 mm. May: 213 mm. Jun: 454 mm. Jul: 229 mm. Aug: 288 mm. Sep: 395 mm. Oct: 246 mm. Nov: 61 mm. Dec: 19 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 69%. Feb: 65%. Mar: 60%. Apr: 60%. May: 71%. Jun: 85%. Jul: 80%. Aug: 82%. Sep: 87%. Oct: 84%. Nov: 79%. Dec: 73%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 7 km/h . Feb: 7 km/h . Mar: 7 km/h . Apr: 6 km/h . May: 6 km/h . Jun: 5 km/h . Jul: 5 km/h . Aug: 5 km/h . Sep: 5 km/h . Oct: 6 km/h . Nov: 7 km/h . Dec: 7 km/h .
Sunshine
Sunshine
Sunshine: Jan: 11h. Feb: 11h. Mar: 11h. Apr: 12h. May: 11h. Jun: 9h. Jul: 11h. Aug: 10h. Sep: 10h. Oct: 10h. Nov: 10h. Dec: 10h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 7. Feb: UV 8. Mar: UV 9. Apr: UV 9. May: UV 9. Jun: UV 8. Jul: UV 9. Aug: UV 9. Sep: UV 8. Oct: UV 7. Nov: UV 7. Dec: UV 7.
Monthly Daylight Hours
Daylight 12h 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 is trending wetter by about 41 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Mar 2025 · 28°C | Apr · 28°C |
| Coldest month | Jan 2025 · 14°C | Jan · 14°C |
| Wettest month | Jun 2025 · 494 mm | Jun · 454 mm |
| Windiest month | Jan 2025 · 7 km/h | Jan · 7 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March
Excellent April
Good May
Wet June
Wet July
Wet August
Wet September
Wet October
Wet November
Excellent December best
Excellent | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 24°C / 14°C | 25°C / 14°C | 4days (13 mm) Good | 10.5h Excellent | 69% Muggy | 7.2 Very High | Excellent | View Details |
| February best | 26°C / 14°C | 27°C / 14°C | 4days (14 mm) Good | 10.8h Excellent | 65% Muggy | 8.2 Very High | Excellent | View Details |
| March | 28°C / 16°C | 29°C / 16°C | 8days (26 mm) Wet | 11.1h Excellent | 60% Moderate | 9 Very High | Excellent | View Details |
| April | 28°C / 17°C | 30°C / 18°C | 16days (66 mm) Wet | 11.6h Excellent | 60% Moderate | 8.9 Very High | Good | View Details |
| May | 27°C / 18°C | 30°C / 20°C | 28days (213 mm) Wet | 11h Excellent | 71% Muggy | 9 Very High | Wet | View Details |
| June | 24°C / 17°C | 28°C / 19°C | 29days (454 mm) Wet | 9.2h Good | 85% Humid | 7.8 Very High | Wet | View Details |
| July | 25°C / 16°C | 28°C / 18°C | 25days (229 mm) Wet | 10.5h Excellent | 80% Humid | 8.6 Very High | Wet | View Details |
| August | 25°C / 17°C | 28°C / 18°C | 28days (288 mm) Wet | 10.3h Excellent | 82% Humid | 8.7 Very High | Wet | View Details |
| September | 24°C / 17°C | 28°C / 19°C | 29days (395 mm) Wet | 9.5h Good | 87% Very Muggy | 8 Very High | Wet | View Details |
| October | 24°C / 16°C | 26°C / 18°C | 24days (246 mm) Wet | 9.5h Good | 84% Humid | 7.2 Very High | Wet | View Details |
| November | 23°C / 15°C | 25°C / 16°C | 11days (61 mm) Wet | 10h Excellent | 79% Humid | 6.7 High | Excellent | View Details |
| December best | 24°C / 14°C | 25°C / 14°C | 4days (19 mm) Good | 10.1h Excellent | 73% Muggy | 6.6 High | Excellent | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Siltepec are January, February, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Siltepec, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Siltepec is April, with average daytime highs of 28°C (82°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Siltepec is January, with average overnight lows of 14°C (57°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Siltepec is June, averaging 454mm of precipitation across 29 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Siltepec runs through June, September, May, August, with the heaviest rainfall in June. Based on 10-year averages for Siltepec.
Siltepec receives approximately 124 sunshine hours per year. The sunniest month is April with around 12 hours. Based on climate data for Siltepec.
The least favorable months to visit Siltepec are May, June, July, August, primarily due to heavy rainfall. For the best conditions, consider January, February, December instead.
The annual average UV index in Siltepec is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Siltepec is 75%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Average wind speeds in Siltepec are 6 km/h (4 mph). The windiest month is January with peak winds reaching 7 km/h (4 mph) (gusts up to 35 km/h / 22 mph).
Siltepec averages 4 clear-sky days per month with overall cloud cover around 61%. The clearest skies occur in February.
The annual average dew point in Siltepec is 16°C (61°F), which feels noticeably humid. Summer months may feel slightly sticky, but conditions remain manageable for most people.
Siltepec has a Tropical Monsoon climate, classified as Am under the Köppen system. Tropical climates are warm year-round with high rainfall and temperatures rarely dropping below 18°C (64°F).
The 'feels like' temperature in Siltepec ranges from 17°C (63°F) to 27°C (81°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
July is not the best time to visit Siltepec, with a climate score of 6.8/10. Consider visiting during January, February, December instead for better conditions.
For July in Siltepec, pack Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). With average highs of 25°C (76°F) and 25 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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