Harlan (IA) Sunshine Hours by Month

In climate discussions, the hours of sunlight reveal much about a location. This page shows the total number of hours of direct sunlight per month and the average hours per day in Harlan, Iowa, United States of America. The figures are based on a 30-year period (1990–2020) to provide a reliable average.

Monthly hours of sunshine

Sunshine in Harlan varies greatly throughout the year. The sunniest month, July, reaches an impressive 335 hours, while December, the darkest month, offers only 133 hours. The total annual amount of sun is 2736 hours.

Daily hours of sunshine

Seasonal changes in sunshine hours are quite obvious in Harlan. While July receives considerable daily sunshine with up to 11.2 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.4 hours of sunlight per day.

Average percent of sunshine

On average the sun shines 72% of the time during the day in July, the highest percentage of any month. December has the lowest percentage at 47%.

Harlan enjoys an average of 2736 hours of sunshine annually. Let’s compare this with some popular tourist destinations:

In Lisbon, Portugal, there are approximately 2801 hours of sunshine annually, highlighting its warm and sunny Mediterranean climate.

In contrast, Tromsø , Norway, receives only about 1270 hours of sunshine per year, known for the polar night with no sunlight for weeks during winter.

Meanwhile, Buenos Aires, Argentina, enjoys a humid subtropical climate with 2520 hours of sunshine annually.

In Brisbane, Australia, the annual sunshine averages 2999 hours, making it one of Australia’s sunniest cities.

August, Harlan’s wettest month, receives 93 mm (3.7 in) of rainfall and has a maximum daytime temperature of 28°C (82°F). During the driest month January you can expect a temperature of -1°C (30°F).

For more detailed insights into the city’s temperatures, check out our Temperature page. To explore more about precipitation patterns, visit our Harlan Precipitation page.