July weather forecastMerrimac, IA
July
Weather in July
July, like June, in Merrimac, Iowa, is a moderately hot summer month, with temperature in the range of an average low of 65.3°F (18.5°C) and an average high of 82.4°F (28°C).Temperature
The warmest period tends to be July, when average temperatures fluctuate between a high of 82.4°F (28°C) and a low of 65.3°F (18.5°C).Heat index
The heat index value for July is evaluated at a tropical 91.4°F (33°C). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.When assessing, remember that heat index measurements are for light winds and shaded spots. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values remain especially vital for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
Humidity
The most humid month in Merrimac, Iowa, is July, with an average relative humidity of 83%.Rainfall
In Merrimac, in July, during 15.5 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. Throughout the year, there are 140.1 rainfall days, and 29.92" (760mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Merrimac, the average length of the day in July is 14h and 47min.On the first day of July, sunrise is at 5:38 am and sunset at 8:43 pm. On the last day of the month, sunrise is at 6:02 am and sunset at 8:24 pm CDT.
Sunshine
The month with the most sunshine is July, with an average of 10h of sunshine.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 6 in July transforms into this advice:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Merrimac, IA
- Average high temperature in July: 82.4°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in July: 65.3°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in July
Merrimac, IA
- Average pressure in July: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in July
Merrimac, IA
- Average wind speed in July: 6.9mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity in July
Merrimac, IA
- Average humidity in July: 83%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in July
Merrimac, IA
- Average rainfall in July: 2.83"
The wettest month (with the highest rainfall) is May (4.29").
The driest months (with the least rainfall) are February and December (1.38").
Average rainfall days in July
Merrimac, IA
- Average rainfall days in July: 15.5 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.6 days).
Average snowfall in July
Merrimac, IA
- Average snowfall in July: 0"
The month with the highest snowfall is January (4.76").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in July
Merrimac, IA
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in July /
Average sunshine in July
Merrimac, IA
- Average daylight in July: 14h and 48min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in July: 10h
The month with the most sunshine is July (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 4h).
Average sunshine days in July
Merrimac, IA
- Average sunshine days in July: 13 days
The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is May (10.6 days).
Average UV index in July
Merrimac, IA
- Average UV index in July: 6
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in July
Merrimac, IA
- Average cloud cover in July: 31
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July, August and September (Cloud cover 31).
Average visibility in July
Merrimac, IA
- Average visibility in July: 5mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
