Last updated: February 24, 2025
In Saint Helens, United States, August presents a dynamic blend of weather patterns marked by a maximum temperature of 39°C (102°F), an average of 20°C (69°F), and a refreshing minimum of 8°C (47°F). This month experiences only 11 mm (0.4 in) of precipitation, spread over just 2 days, making it predominantly dry. However, the air carries a notable humidity level of 74%, creating a warm and sometimes muggy atmosphere. Whether you're exploring the outdoors or relaxing indoors, August in Saint Helens offers a unique blend of heat and occasional respite.
In August, Saint Helens experiences a delightful peak in summer warmth, characterized by a minimum temperature of 8°C (47°F) and an average of 20°C (69°F). With maximum temperatures soaring up to a sizzling 39°C (102°F), this month stands out as a time for outdoor activities and enjoying the vibrant natural beauty of the area. The warmth of August is a fitting culmination of a gradually rising trend throughout the summer months, beginning with cooler January temperatures of -14°C (7°F). As the seasons progress, temperatures steadily climb, showcasing a significant shift in climate that invites residents and visitors alike to revel in the sun-drenched days of late summer. This consistent increase in both average and peak temperatures underscores Saint Helens' seasonal character, making August a perfect time to embrace the great outdoors.
In August, Saint Helens experiences a notable lull in precipitation, receiving only 11 mm (0.4 in) across just 2 days. This minor rainfall follows the peak wet months of January through April, where precipitation often exceeds 140 mm. As the summer progresses, the region dries out significantly, with July recording a mere 9 mm (0.3 in), marking the driest month of the year. However, August's light showers hint at a transition toward the wetter fall months ahead, with September's precipitation expected to jump to 90 mm (3.6 in). The patterns clearly illustrate a significant dip in moisture during the height of summer, making the end of August a brief pause before the autumn rains return with a vengeance.
August marks a noticeable shift in humidity levels in Saint Helens, United States, dropping to 74%, the lowest for the year. This decline in moisture is part of a broader trend observed throughout the summer months, as July also shows a decrease with 82% humidity. In contrast, the beginning of the year is characterized by high humidity levels, consistently hovering around 85% from January to March. As the seasons transition, humidity levels rise again in late fall and winter, peaking at 87% in November and December. This rhythmic fluctuation not only underscores the region's temperate climate but also highlights August as a brief reprieve from the otherwise moist conditions of the year.
In August, Saint Helens, United States, experiences a UV Index of 8, placing it firmly in the very high exposure category, which means that sun protection is essential to avoid harmful UV effects. With a burn time of just 15 minutes, it's crucial for residents and visitors alike to be mindful of their time outdoors, especially as the summer sun continues to shine brightly. This month's UV levels reflect a slight decrease from the peak summer months of June and July, which both recorded a UV Index of 10, yet still demand attention to skin safety. As we transition into the fall, September's UV Index is projected to drop to 7, indicating a gradual reduction in UV exposure. For more details on UV levels throughout the year, check the comprehensive guide here: Saint Helens UV Index.
UV Risk Categories
August in Saint Helens, United States, showcases a vibrant tapestry of summer sunshine, with an impressive 335 hours of sunshine basking the land. This month, while slightly less radiant than July's peak of 374 hours, still represents a significant contribution to the overall warmth of the season. Following the flourishing spring months, where sunshine steadily increased from 88 hours in January to 282 hours in May, August signals a gradual transition into early autumn, as the daylight hours begin to wane. The sun-drenched days of summer linger a little longer, providing residents and visitors alike with ample opportunities to revel in outdoor delights before the cooler months arrive.
In Saint Helens, August offers a 55% chance of sunny weather, making it one of the more promising months for outdoor activities. This likelihood reflects a notable trend towards warmer and sunnier conditions, building from a mere 15% in January to a peak 73% by July. As summer reaches its zenith, the skies remain predominantly clear, although the percentage dips slightly as August transitions towards autumn. This pattern highlights the region's shift from the gray, overcast winter months to the more vibrant and sunny summer days, inviting residents and visitors alike to bask in the warmth of the late summer sun.
In Saint Helens, United States, the daylight duration follows a clear seasonal rhythm throughout the year. Starting from just 9 hours in January, the days gradually lengthen as spring unfolds, peaking at 15 hours in June and July. This summer abundance of light begins to taper off in August, where the daylight averages 14 hours, providing a perfect balance between warmth and evening activities. As the year transitions into fall, daylight dwindles to 12 hours in September and further decreases to 10 hours in October, making way for the shorter days of winter, which see only 8 hours in December. This cyclical pattern not only enhances the natural beauty of each season but also offers residents a diverse range of outdoor experiences throughout the year.
In Saint Helens, August brings a gentle breeze, with an average wind speed of 2.4 m/s (5 mph). This leisurely wind is typical for the month, aligning closely with the patterns established earlier in the year. Throughout the first half of the year, wind speeds fluctuate modestly, peaking in July at 2.7 m/s (6 mph), just before August's slight dip. Interestingly, from August onward, the winds begin to show a gradual uptick, particularly in the fall months. October and November see an increase back to 2.6 m/s and 2.7 m/s respectively, signaling a transition into a windier season. Overall, August's breeze offers a serene yet dynamic experience, perfectly encapsulating the shifting seasons of Saint Helens.
The weather in Saint Helens 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 Saint Helens and find detailed weather information for every month.
August and January present a stark contrast in weather patterns. In August, temperatures can soar to a maximum of 39°C (102°F) with an average of 20°C (69°F), while January brings much colder conditions with highs reaching only 14°C (58°F) and an average temperature of 5°C (41°F). Precipitation levels also differ significantly; August typically sees just 11 mm (0.4 in) over 2 days, compared to January's substantial 205 mm (8.1 in) across 17 days, accompanied by a higher humidity of 85%. For a closer look at what to expect in January, you can visit Saint Helens weather in January.
August and February present striking contrasts in weather. August showcases a warm climate, with temperatures ranging from a mild 8°C (47°F) at night to a scorching maximum of 39°C (102°F), accompanied by low precipitation of just 11 mm (0.4 in) over two days. In contrast, February is marked by significantly cooler temperatures, with a minimum of -7°C (19°F) and an average of only 4°C (40°F), along with a substantial increase in rainfall—205 mm (8.1 in) over 20 days. Additionally, February has higher humidity levels at 84%, compared to August’s 74%. For more insights on the February climate, you can check out Saint Helens weather in February.
August and March present strikingly different weather patterns. In August, temperatures reach a maximum of 39°C (102°F) with an average of 20°C (69°F), characterized by low precipitation of just 11 mm (0.4 in) over 2 days and a humidity of 74%. In contrast, March delivers a cooler atmosphere, where temperatures vary from a minimum of -3°C (27°F) to a maximum of 22°C (73°F), accompanied by significant rainfall of 163 mm (6.4 in) over 18 days, and higher humidity at 85%. For more details, you can check out Saint Helens weather in March.
When comparing the weather in August and April, a striking contrast emerges. August boasts a much warmer climate with temperatures ranging from a minimum of 8°C (47°F) to a scorching maximum of 39°C (102°F) and an average of 20°C (69°F). In stark contrast, April experiences cooler temperatures, with a minimum of -1°C (30°F) and a maximum of 29°C (85°F), averaging only 10°C (51°F). While August has relatively low precipitation of just 11 mm (0.4 in) over 2 days, April is quite the opposite, featuring significant rainfall totaling 140 mm (5.5 in) across 16 rainy days. Additionally, humidity levels remain high in both months, but April's 83% slightly surpasses August's 74%. For those interested in a deeper look into April's weather specifics, visit Saint Helens weather in April.
When comparing the weather in August and May, a stark contrast emerges. August experiences warmer temperatures with a minimum of 8°C (47°F) and an average of 20°C (69°F), peaking at 39°C (102°F). In contrast, May presents cooler conditions, starting at a minimum of 3°C (37°F), averaging at 14°C (57°F), and reaching a maximum of 32°C (90°F). Additionally, precipitation in August is relatively low at 11 mm (0.4 in) over just 2 days, while May sees significantly more rain, with 73 mm (2.9 in) over 11 days. Humidity levels are also higher in May at 83%, compared to 74% in August. For those looking for more detailed insights, check out Saint Helens weather in May.
When comparing the weather in August and June, we see notable differences. August typically features a broader temperature range, with minimums around 8°C (47°F) and maximums reaching up to 39°C (102°F), while June has slightly cooler temperatures, ranging from a minimum of 6°C (43°F) to a maximum of 45°C (113°F). Precipitation also varies significantly; August is relatively dry with only 11 mm (0.4 inches) over 2 days, whereas June experiences more rainfall at 62 mm (2.5 inches) spread over 9 days. Additionally, humidity levels in August average 74%, compared to a higher 83% in June. For those seeking detailed weather information, you can check out Saint Helens weather in June.
In comparing the weather between July and August, we see that both months have a similar range of temperatures, with August recording a slightly higher maximum temperature of 39°C (102°F) compared to July's 37°C (99°F). The average temperatures are quite alike, with August averaging 20°C (69°F) and July at 20°C (68°F). Precipitation levels are fairly consistent, with August receiving 11 mm (0.4 in) and July 9 mm (0.3 in), both spread over two days. However, humidity in August is lower at 74%, down from July's 82%. For detailed information on July's weather, you can refer to Saint Helens weather in July.
August typically features warmer temperatures, with average highs reaching up to 39°C (102°F) and an average of 20°C (69°F). The humidity is relatively high at 74%, but the month experiences minimal precipitation, with only 11 mm (0.4 in) over just 2 days. In contrast, September brings a noticeable drop in temperatures, with a maximum of 35°C (95°F) and an average of 17°C (63°F). However, the month is significantly wetter, receiving 90 mm (3.6 in) of rain across 9 days, and the humidity slightly decreases to 71%. For more detailed insights, you can check Saint Helens weather in September.
August and October present a stark contrast in weather conditions. In August, temperatures range from a comfortable minimum of 8°C (47°F) to a sweltering maximum of 39°C (102°F), with an average temperature of 20°C (69°F). The month experiences minimal precipitation, with only 11 mm (0.4 in) recorded over just two days, and humidity levels averaging around 74%. In contrast, October sees a significant drop in temperatures, with a minimum of -2°C (29°F) and an average of 11°C (52°F). The maximum temperature is more moderate at 26°C (78°F). However, October is much wetter, accumulating 149 mm (5.9 in) of precipitation over 13 rainy days, while humidity rises to 81%. For more detailed information, you can check Saint Helens weather in October.
In August, the weather is typically warm with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 39°C (102°F), averaging around 20°C (69°F). With relatively low precipitation of just 11 mm (0.4 in) over two days and a humidity level of 74%, August offers a pleasant and dry climate for outdoor activities. In contrast, November presents a stark shift, featuring much cooler temperatures with a minimum of -3°C (27°F) and a maximum of 18°C (64°F), averaging only 7°C (46°F). The month is considerably wetter, receiving 209 mm (8.2 in) of precipitation spread over 18 days, coupled with higher humidity at 87%. For a closer look at what to expect, check out Saint Helens weather in November.
In August, the weather is characterized by warmer temperatures, with an average of 20°C (69°F) and highs reaching up to 39°C (102°F). The month sees limited rainfall, with only 11 mm (0.4 in) of precipitation occurring over just 2 days, alongside a relatively comfortable humidity level of 74%. In contrast, December brings a significant drop in temperature, with averages around 5°C (41°F) and a maximum of only 15°C (59°F). This winter month experiences much more precipitation—224 mm (8.8 in) spread across approximately 20 days—resulting in higher humidity at 87%. For more detailed information on December weather, please visit Saint Helens weather in December.
August in Saint Helens stands out as a vibrant end to summer, featuring warm temperatures that frequently peak near a sizzling 39°C (102°F), while offering a comfortable average of 20°C (69°F). Unlike the wetter months, this period sees significantly reduced precipitation, with only a couple of rainy days contributing to a modest total of 11 mm (0.4 in) of rainfall. The higher humidity of around 74% can add a touch of stickiness to the warm air, making the evenings feel pleasantly balmy. In contrast to the rest of the year, which varies more dramatically in temperature and rainfall, August invites locals and visitors alike to relish the warmth before fall takes hold. For a deeper dive into the seasonal trends, explore the detailed Saint Helens Climate.