Last updated: February 24, 2025
August in Hannibal, United States, offers a vibrant yet humid summer experience. With maximum temperatures peaking at 35°C (96°F) and a comfortable average of 24°C (75°F), residents and visitors alike can expect warm days, perfect for outdoor activities. However, the month also brings occasional relief in the form of rain, contributing to a total precipitation of 99 mm (3.9 in) over 10 days. The high humidity level, hovering around 80%, adds to the muggy atmosphere, making it essential to stay hydrated while enjoying the scenic beauty of this charming town.
In Hannibal, United States, August brings a pleasant warmth that gradually peaks as summer winds down. With nighttime temperatures averaging around 12°C (55°F) and daytime highs soaring to 35°C (96°F), it’s a month where the heat can be both invigorating and a little overwhelming. The average temperature hovers at a comfortable 24°C (75°F), making it the perfect time for outdoor activities before the cooler autumn air sets in. Compared to the chill of earlier months, like January's chilling lows of -26°C (-15°F), August represents a bright shift in climate that encourages residents and visitors alike to soak up the sun while relishing the last of summer's heat.
August in Hannibal sees a moderate precipitation level, with 99 mm (3.9 in) falling over approximately 10 days. As summer transitions towards autumn, this amount is consistent with the month's trend of increased moisture compared to the drier months of July and September, which receive 92 mm (3.6 in) and 85 mm (3.3 in), respectively. The rainfall in August contributes to the lush landscapes of the region and supports the growth of local flora, making it a vital period for both agriculture and nature. Overall, the steady rainfall patterns from spring into late summer culminate in a comfortably moist August, highlighting the shift in the season while providing essential hydration for the environment.
August in Hannibal, United States, showcases a mild humidity level of 80%, continuing a trend of relatively stable moisture throughout the summer months. This slight dip from July's 81% reflects typical late-summer conditions, where the air begins to feel a bit drier as fall approaches. Interestingly, humidity levels are consistently high in the early winter, peaking at 86% in December, while remaining relatively moderate from May through August. As the year progresses, the fall months bring a noticeable decrease, with September and October seeing levels drop to 76%. This pattern highlights Hannibal's seasonal humidity shifts, contributing to its unique climate experience.
As summer transitions into early autumn, Hannibal, Missouri, experiences a notable surge in UV Index levels. In August, the UV Index stands at 10, categorizing it as very high and necessitating a burn time of just 15 minutes for unprotected skin. This level, while slightly lower than the peak extremes seen in June and July, remains indicative of the intense sun exposure common during this time. Following a pattern from earlier months, particularly from April through July, residents and visitors should remain vigilant about sun safety, as the UV Index indicates the continued need for protective measures. For those looking to plan outdoor activities, understanding these trends is crucial for protecting skin health—explore more at Hannibal UV Index.
UV Risk Categories
As summer begins to wane in Hannibal, United States, August maintains a vibrant glow with approximately 330 hours of sunshine, a slight dip from the peak of July but still impressive. This month continues the trend of generous sunlight, following the gradual increase from the winter months, where just 122 hours were recorded in January. Notably, the sunshine hours have surged significantly, nearly tripling by May, when residents basked in 280 hours of warm rays. The consistent sunshine extends into September, albeit with a noticeable decrease as autumn approaches, hinting at the transition from summer's hearty embrace to the cozy serenity of fall. As the sun-painted skies of August linger, they offer a final flourish before the days grow shorter and the landscape prepares for cooler temperatures.
In Hannibal, United States, August emerges as a vibrant month for sunshine, boasting a 51% chance of bright, sunny weather. This marks a noticeable uptick from the summer months of June and July, both at 46%, indicating that late summer brings a more favorable climate for outdoor activities. As the year progresses, July’s sunny disposition transitions into a peak in August, before settling into a more variable September, which has a 67% chance of sun. This trend underscores a delightful opportunity for residents and visitors alike to soak up the sun before autumn arrives, making August an ideal time for enjoying the great outdoors.
In Hannibal, United States, August brings a delightful 13 hours of daylight, a slight decline from the peak of 14 hours experienced during the summer months of June and July. This gradual decrease marks a transition towards the shorter days of fall, following the longest daylight stretch of the year. Notably, the daylight duration begins to taper off after May, reflecting the shift from the vibrant energy of summer towards the more subdued tones of early autumn. As September approaches with its 12 hours of daylight, residents can still savor the remnants of summer's light, hinting at the cyclical nature of the seasons.
As summer transitions to fall in Hannibal, August brings a gentle shift in the breeze, with an average wind speed of 2.6 m/s (6 mph). This marks a decline from the peak winds experienced in the earlier spring months, where March saw a more brisk average of 4.1 m/s (9 mph). It’s a month characterized by a mild, comfortable wind, after the bustling air of July, which recorded the lightest breezes at 2.2 m/s (5 mph). Following August, the wind speed gradually picks up again, hinting at the seasonal changes ahead as September averages 3.2 m/s (7 mph). This trend reflects how Hannibal's annual climate offers a unique rhythm, with breezes softening during the height of summer and then reawakening as autumn approaches.
The weather in Hannibal 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 Hannibal and find detailed weather information for every month.
August and January present stark contrasts in temperature and overall weather conditions. In August, temperatures range from a mild 12°C (55°F) at night to a sweltering 35°C (96°F) during the day, coupled with high humidity at 80% and significant precipitation of 99 mm (3.9 in) over approximately 10 days. In contrast, January sees much colder temperatures, with a minimum of -26°C (-15°F) and a maximum of only 17°C (63°F) and an average temperature of -2°C (29°F). While January is drier, receiving 65 mm (2.5 in) of precipitation over about 7 days, it maintains a high humidity level of 82%. If you'd like more details about January's climate, check out Hannibal weather in January.
August and February present starkly contrasting weather patterns. August boasts a warm average temperature of 24°C (75°F), with highs reaching up to 35°C (96°F) and a relatively high humidity level of 80%. In contrast, February experiences frigid conditions, with an average temperature of 0°C (32°F) and lows plummeting to -26°C (-15°F). While February has slightly lower precipitation at 62 mm (2.4 in) over 9 days compared to August's 99 mm (3.9 in) over 10 days, the humidity remains consistent at 80%. For a more detailed look at February weather specifics, you can visit Hannibal weather in February.
August and March present a stark contrast in weather conditions. In August, temperatures range from a mild 12°C (55°F) at night to a scorching 35°C (96°F) during the day, with an average of 24°C (75°F). While the humidity remains high at 80%, the month experiences approximately 99 mm (3.9 in) of rain over 10 days. Conversely, March has much colder temperatures, with nighttime lows dropping to -17°C (2°F) and daytime highs reaching 25°C (78°F), averaging around 7°C (45°F). Although March sees a slightly higher precipitation total of 125 mm (4.9 in) over 11 days, the humidity remains constant at 80%. For a closer look at March weather, check out Hannibal weather in March.
When comparing the weather in August and April, significant differences emerge. August boasts warmer temperatures, with an average of 24°C (75°F) and a maximum reaching up to 35°C (96°F). In contrast, April experiences much cooler conditions, averaging only 12°C (53°F) and maxing out at 29°C (85°F). Both months see similar levels of precipitation, with August recording 99 mm (3.9 in) and April slightly higher at 103 mm (4.0 in), but the humidity remains consistent at 80% for both. For a detailed look at April's climate, check out Hannibal weather in April.
When comparing the weather in August and May, notable differences emerge. August typically enjoys warmer conditions, with average temperatures reaching 24°C (75°F) and maximums soaring to 35°C (96°F). In contrast, May experiences cooler averages of 19°C (66°F), with minimum temperatures dropping to 3°C (38°F). While August sees less precipitation at 99 mm (3.9 in) over 10 days, May is wetter, accumulating 160 mm (6.3 in) over 15 days. Both months have high humidity, with May slightly edging out August at 82%. For more detailed insights, you can check out Hannibal weather in May.
When comparing the weather in August and June, we see some similarities and differences. Both months feature a similar average temperature of around 24°C (76°F) and can reach maximums of 35°C (96°F), showcasing the warmth common in this time of year. However, June experiences slightly cooler minimum temperatures at 11°C (52°F) compared to August's 12°C (55°F). Precipitation is also notable; June has a higher total of 119 mm (4.7 in) compared to August’s 99 mm (3.9 in), and both months see rain on approximately 10 days. Humidity remains consistently high in both months, with June being marginally more humid at 83% versus August's 80%. For a more detailed view of June's conditions, you can check Hannibal weather in June.
In comparing the weather between July and August, we see that both months are quite warm, with August having slightly cooler minimum and average temperatures. In August, the minimum temperature drops to 12°C (55°F), while July's minimum is 14°C (58°F). The average temperature in August is 24°C (75°F) compared to July's 26°C (79°F). In terms of maximum temperatures, August peaks at 35°C (96°F), just a notch below July's high of 36°C (97°F). Both months experience considerable rainfall, with August recording 99 mm (3.9 in) over 10 days, slightly more than July's 92 mm (3.6 in) across 9 days. Humidity remains relatively high in both months, with 80% in August and slightly higher at 81% in July. For further details on July's weather, you can visit Hannibal weather in July.
In August, temperatures are typically warmer, with a minimum of 12°C (55°F) and an average of 24°C (75°F), reaching a high of 35°C (96°F). The month also experiences higher humidity at 80% and receives about 99 mm (3.9 in) of precipitation over approximately 10 days. In contrast, September sees cooler temperatures, with a minimum of 7°C (45°F) and an average of 22°C (71°F), while still occasionally hitting highs of 35°C (95°F). Rainfall decreases to 85 mm (3.3 in) over around 7 days, and humidity drops slightly to 76%. For more details on the weather in September, you can visit Hannibal weather in September.
August and October present contrasting weather patterns. In August, temperatures range from a minimum of 12°C (55°F) to a maximum of 35°C (96°F), with an average of 24°C (75°F) and humidity levels hovering around 80%. August also experiences about 99 mm (3.9 in) of rainfall over 10 days. In contrast, October sees a much cooler temperature range, with minimums dropping to -5°C (24°F) and averages around 14°C (57°F), while maximums reach up to 32°C (91°F). October's precipitation slightly increases to 108 mm (4.2 in), maintaining the same number of wet days. Despite higher rainfall, October's humidity is slightly lower at 76%. For more details on October weather specifically, you can check Hannibal weather in October.
August and November present striking contrasts in weather conditions. August features a warm climate with average temperatures around 24°C (75°F) and maximums reaching up to 35°C (96°F), coupled with high humidity at 80%. This summer month also experiences a fair amount of precipitation, totaling 99 mm (3.9 in) over about 10 days. In contrast, November ushers in significant temperature drops, with average temperatures plummeting to 6°C (43°F) and a minimum of -14°C (6°F). Despite being cooler, November still records a maximum of 24°C (75°F), though its precipitation is lighter at 60 mm (2.4 in) over 9 days, along with slightly higher humidity at 85%. For a detailed view of November weather, you can refer to Hannibal weather in November.
August and December present stark contrasts in weather conditions. In August, temperatures range from a minimum of 12°C (55°F) to a scorching maximum of 35°C (96°F), with an average of 24°C (75°F). The month experiences significant rainfall, totaling 99 mm (3.9 in) over approximately 10 days, and a humidity level of 80%. Conversely, December brings much colder weather, with temperatures plummeting to a minimum of -19°C (-2°F) and peaking at 23°C (73°F), resulting in an average temperature of just 2°C (37°F). Precipitation is less frequent in December, with only 45 mm (1.8 in) falling over about 6 days, while humidity increases slightly to 86%. For more detailed information, you can visit Hannibal weather in December.
As August wraps up summer in Hannibal, the weather presents a notable contrast to the preceding months. With temperatures peaking at a maximum of 35°C (96°F), the air is warm and inviting, while the average settles at a comfortable 24°C (75°F). Although humidity lingers at a high 80%, creating a sultry atmosphere, it is the significant precipitation—99 mm (3.9 in) over about 10 days—that sets August apart, hinting at the transition towards the rainier fall months. For those planning their visit, understanding these August conditions is essential for enjoying everything this vibrant city has to offer. For more detailed insights, visit Hannibal Climate.