Last updated: February 26, 2025
In August, Chamonix-Mont-Blanc experiences a delightful blend of temperatures with a maximum of 25°C (77°F), an average of 13°C (56°F), and a refreshing minimum of 2°C (36°F). This month is characterized by a moderate precipitation total of 149 mm (5.9 in), spread over approximately 17 days, contributing to the lush scenery of the region. With an average humidity of 63%, visitors can expect a pleasant alpine climate, making it an ideal time for outdoor adventures amidst breathtaking landscapes.
In August, Chamonix-Mont-Blanc experiences a delightful transition into late summer, with temperatures ranging from a minimum of 2°C (36°F) to a comfortable maximum of 25°C (77°F). The average temperature settles around 13°C (56°F), reflecting a significant warming trend compared to the chillier months earlier in the year. This period marks a peak in summer warmth, inviting visitors to explore the stunning alpine landscapes under sunny skies. As the month progresses, the fresh mountain air blended with rising temperatures creates an ideal setting for outdoor adventures, from hiking trails to tranquil lakeside picnics, making August a prime time to enjoy the natural beauty of this iconic destination.
In August, Chamonix-Mont-Blanc experiences a moderate precipitation total of 149 mm (5.9 in), falling slightly below the wetter summer months of May and June. This rainfall is spread across 17 days, indicating a consistent pattern of summer showers that nurture the region’s lush landscapes. Compared to the peak precipitation in May (224 mm), August shows a gentle decline, yet it remains relatively wet, maintaining the typical alpine conditions. The trend indicates a gradual transition towards drier weather as the summer winds down, with September forecasted to receive even less rain at 109 mm. This blend of mild precipitation and warm temperatures provides a refreshing experience for visitors, making August a delightful time to enjoy the beauty of the French Alps.
In August, Chamonix-Mont-Blanc experiences a notable shift in humidity, dropping to a comfortable 63%. This is the lowest level recorded throughout the year, reflecting the warm summer months when the air tends to feel fresher and more invigorating, perfect for outdoor adventures in the stunning alpine landscape. As summer peaks, the decreasing humidity continues the trend observed since July, where levels were already at 72%. This steady decline from the higher humidity percentages of late spring and early summer, coupled with the impending return of autumn, creates an inviting atmosphere for visitors seeking to enjoy the majestic mountains while basking in the relatively drier air before the humidity begins to rise again in September.
In August, the UV Index in Chamonix-Mont-Blanc remains notably high at 9, placing it in the very high exposure category with a burn time of just 15 minutes. This trend follows a peak during the summer months, where June and July both reached a maximum UV Index of 10. Comparatively, August experiences a slight dip, yet the strong UV radiation still calls for caution. As the season transitions into September, the UV Index drops back to 7, indicating a gradual decrease in sun intensity. For those looking to enjoy the breathtaking views and outdoor activities in Chamonix during this vibrant month, it's essential to stay sun-smart and prepared. For more detailed insights, visit the Chamonix-Mont-Blanc UV Index.
UV Risk Categories
August in Chamonix-Mont-Blanc radiates with an impressive 392 hours of sunshine, making it one of the sunniest months of the year. This vibrant month follows a peak in July, which boasts 422 hours, yet stands strong with nearly as much daylight. The summer months of June, July, and August collectively bask in the sun’s glory, showcasing a compelling trend of increasing sunlight leading into the peak of summer. As the season transitions into September, a noticeable drop to 331 hours begins, hinting at the retreat of summer warmth. Overall, the month of August encapsulates the essence of summer in Chamonix, offering a delightful blend of adventure and nature under the welcoming sun.
In August, Chamonix-Mont-Blanc experiences a 37% chance of sunny weather, placing it slightly above the summer months that precede it, like June and July, which hover around 29% and 33%, respectively. This relatively moderate likelihood indicates that while visitors can expect some sunny days during their mountain adventures, they should also prepare for the possibility of overcast skies. Interestingly, the trend shows a decline in sunny days as summer transitions towards autumn, with September dropping to 30%. Therefore, August provides a sweet spot for those hoping to enjoy the beauty of the French Alps under the sunshine, compared to the cooler, clearer conditions seen later in the year.
In August, Chamonix-Mont-Blanc enjoys a delightful 14 hours of daylight, signaling the peak of summer's vibrancy. As the days begin to shorten from July's maximum of 15 hours, the gradual transition highlights a subtle shift towards autumn. This month marks a sweet spot for outdoor enthusiasts, offering ample time for hiking and breathtaking views of the majestic Alps. Following the trend of increasing daylight from the winter months, when January only sees 9 hours, August provides a generous glimpse of long, sunlit days that fuel adventures and create unforgettable memories in this picturesque alpine town.
In Chamonix-Mont-Blanc, August brings a gentle embrace of winds, averaging around 1.2 m/s (3 mph), consistent with the mild breezes of the preceding months. This period marks a slight dip in wind speed compared to the summer peak in July, where the winds also hovered at 1.1 m/s. Interestingly, the overall trend reveals that while winter months experience a gradual increase in wind speeds, summer remains relatively calm, creating an idyllic atmosphere for both hikers and adventurers. As the seasons transition towards autumn, September anticipates an even softer gust at 1.0 m/s, hinting at a quiet descent from the vibrant energy of summer into the serene embrace of fall.
The weather in Chamonix-Mont-Blanc changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Chamonix-Mont-Blanc and find detailed weather information for every month.
August and January present strikingly different weather conditions. In August, temperatures range from a comfortable 2°C (36°F) at night to a pleasant 25°C (77°F) during the day, with an average of 13°C (56°F). Although it experiences considerable rainfall with 149 mm (5.9 in) over 17 days, the humidity is relatively moderate at 63%. In contrast, January is much colder, with temperatures plummeting to a chilling -25°C (-13°F) at night and peaking at only 6°C (44°F) during the day. It also receives slightly more precipitation, totaling 171 mm (6.7 in) over just 10 days, paired with high humidity at 91%. For more details, you can check Chamonix-Mont-Blanc weather in January.
August and February present strikingly contrasting weather experiences. In August, temperatures range from a minimum of 2°C (36°F) to a pleasant maximum of 25°C (77°F), with an average of 13°C (56°F). The month sees significant rainfall, accumulating to 149 mm (5.9 in) over 17 days, accompanied by relatively moderate humidity at 63%. In contrast, February brings much colder conditions, with a minimum temperature plunging to -21°C (-5°F) and an average of -4°C (26°F), reaching a maximum of 11°C (52°F). This winter month experiences slightly lower precipitation at 141 mm (5.5 in) but has a higher humidity level of 87% over 11 days. For more detailed information on the winter conditions, check out Chamonix-Mont-Blanc weather in February.
When comparing the weather in August and March, significant differences emerge. August typically presents milder conditions with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 25°C (77°F) and an average of 13°C (56°F). It also experiences about 149 mm (5.9 in) of precipitation over 17 days, accompanied by a humidity level of 63%. In contrast, March is much colder, featuring temperatures that can dip to a chilling -25°C (-12°F) at night, with daytime averages around -1°C (31°F) and highs reaching 14°C (58°F). March sees slightly more precipitation, totaling 175 mm (6.9 in) across 15 days, but with a higher humidity rate of 84%. For a detailed overview of March's climate, you can visit Chamonix-Mont-Blanc weather in March.
August and April in Chamonix-Mont-Blanc present quite distinct weather experiences. August boasts milder temperatures, with lows around 2°C (36°F) and highs reaching up to 25°C (77°F), making it a more comfortable month for outdoor activities. However, it also sees considerable rainfall, totaling 149 mm (5.9 in) over 17 days, coupled with a humidity level of 63%. In contrast, April is characterized by cooler temperatures, ranging from a minimum of -16°C (3°F) to a maximum of 17°C (63°F), with an average of just 3°C (38°F). Although it has less precipitation at 84 mm (3.3 in) over 13 days, the higher humidity at 83% can make the air feel colder. For a deeper look at Chamonix-Mont-Blanc's April weather, check out Chamonix-Mont-Blanc weather in April.
In comparing the weather of August and May, we see distinct differences in temperature and precipitation patterns. August typically boasts milder temperatures, with average highs around 25°C (77°F) and lows of 2°C (36°F), while May experiences cooler conditions with highs reaching 23°C (74°F) and lows dipping to -12°C (11°F). However, May has more significant rainfall, averaging 224 mm (8.8 in) over 21 days compared to August's 149 mm (5.9 in) across 17 days. Additionally, the humidity in May, at 78%, is notably higher than the 63% humidity recorded in August. For more details, you can check out Chamonix-Mont-Blanc weather in May.
In comparing August and June weather in Chamonix-Mont-Blanc, we see notable differences in temperature and precipitation patterns. August typically features a wider temperature range, with minimums around 2°C and maximums reaching up to 25°C, averaging 13°C. In contrast, June has cooler temperatures, with a minimum of -3°C and a maximum of 28°C but averaging slightly lower at 12°C. Precipitation is also significant in both months, with August receiving 149 mm over 17 days and June experiencing even more at 167 mm over 20 days. The humidity levels are higher in June at 75%, compared to August’s 63%, making June feel more humid overall. For more detailed information, check Chamonix-Mont-Blanc weather in June.
In comparing the weather of August and July, we notice that both months have similar temperature ranges, with August averaging slightly cooler at 13°C (56°F) compared to July's 14°C (57°F). The maximum temperatures are also fairly close, with August reaching up to 25°C (77°F) and July peaking at 27°C (81°F). However, August experiences more precipitation, totaling 149 mm (5.9 in) over 17 days, while July has slightly higher precipitation at 162 mm (6.4 in) over 18 days. Additionally, humidity levels are lower in August at 63%, contrasting with the higher 72% humidity observed in July. For a more detailed view of July weather patterns, you can explore Chamonix-Mont-Blanc weather in July.
August typically offers milder temperatures, ranging from a minimum of 2°C (36°F) to a maximum of 25°C (77°F), with an average of 13°C (56°F). This month experiences more precipitation, with 149 mm (5.9 in) over 17 days, accompanied by a humidity level of 63%. In contrast, September brings cooler temperatures, with lows dropping to -8°C (19°F) and highs peaking at 21°C (71°F), resulting in an average of 10°C (49°F). Despite the cooler vibe, September sees slightly less precipitation at 109 mm (4.3 in) over 16 days, and humidity rises to 73%. For more details, you can check out Chamonix-Mont-Blanc weather in September.
August and October present contrasting weather conditions, with August enjoying milder temperatures that range from a minimum of 2°C (36°F) to a maximum of 25°C (77°F) and an average of 13°C (56°F). The month experiences considerable rainfall, totaling 149 mm (5.9 in), spread over 17 days, accompanied by moderate humidity levels at 63%. In contrast, October sees a drop in temperatures, with a minimum of -8°C (18°F), an average of 5°C (42°F), and a maximum of 18°C (65°F). Precipitation is slightly less, at 133 mm (5.3 in), occurring over 13 days, but the humidity significantly increases to 89%. For more detailed insights, you can check Chamonix-Mont-Blanc weather in October.
August and November present strikingly different weather patterns. In August, temperatures range from a mild 2°C (36°F) at night to a pleasant average of 13°C (56°F) and can peak at 25°C (77°F) during the day, making it a much warmer month overall. However, it also experiences considerable rainfall, with 149 mm (5.9 in) of precipitation spread over 17 days and a humidity level of 63%. In contrast, November sees a significant drop in temperature, with nighttime lows plunging to -18°C (-1°F) and an average of -1°C (30°F), while daytime highs reach only 15°C (60°F). Although it receives slightly less precipitation at 120 mm (4.7 in), the humidity rises to 90%, contributing to a damp chill in the air. For a more detailed look at November weather, you can visit Chamonix-Mont-Blanc weather in November.
The weather in August and December presents a striking contrast. August features milder temperatures, with a minimum of 2°C (36°F) and a maximum of 25°C (77°F), making it a pleasant summer month. In contrast, December plunges into much colder conditions, with temperatures ranging from a chilling -23°C (-8°F) to a maximum of 8°C (46°F). Additionally, December sees significantly higher precipitation at 295 mm (11.6 in) over 19 days, compared to August's 149 mm (5.9 in) over 17 days. The humidity is also notably higher in December at 90%, compared to August's 63%. For more insights into the winter conditions, check out Chamonix-Mont-Blanc weather in December.
In August, Chamonix-Mont-Blanc experiences a delightful blend of mild temperatures and increased precipitation compared to other months. The warm days invite outdoor enthusiasts to explore the stunning alpine scenery, while the cooler nights offer a refreshing respite. However, travelers should prepare for the possibility of rain, as this month tends to be one of the wetter periods, with significant humidity adding to the mountain atmosphere. Overall, August provides a vibrant yet varied experience, perfect for both adventure seekers and those looking to enjoy the serene beauty of the region. For more detailed insights, check out Chamonix-Mont-Blanc Climate.