Average Weather in Waterloo Indiana, United States
In Waterloo, the summers are warm, the winters are freezing and windy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 19°F to 83°F and is rarely below 1°F or above 91°F.
The warm season lasts for 3.8 months, from May 24 to September 19, with an average daily high temperature above 73°F. The hottest day of the year is July 19, with an average high of 83°F and low of 64°F.
The cold season lasts for 3.2 months, from November 30 to March 6, with an average daily high temperature below 42°F. The coldest day of the year is January 29, with an average low of 19°F and high of 32°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
In Waterloo, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Waterloo begins around June 3 and lasts for 5.0 months, ending around November 3. On August 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.
The cloudier part of the year begins around November 3 and lasts for 7.0 months, ending around June 3. On January 26, the cloudiest day of the year, the sky is overcast or mostly cloudy 65% of the time, and clear, mostly clear, or partly cloudy 35% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Waterloo varies throughout the year.
The wetter season lasts 6.5 months, from March 23 to October 7, with a greater than 26% chance of a given day being a wet day. The chance of a wet day peaks at 36% on May 27.
The drier season lasts 5.5 months, from October 7 to March 23. The smallest chance of a wet day is 16% on February 3.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 36% on May 27.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Waterloo experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Waterloo. The most rain falls during the 31 days centered around June 2, with an average total accumulation of 3.6 inches.
The least rain falls around February 3, with an average total accumulation of 0.9 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Waterloo experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 4.4 months, from November 22 to April 4, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 15, with an average total liquid-equivalent accumulation of 0.4 inches.
The snowless period of the year lasts for 7.6 months, from April 4 to November 22. The least snow falls around July 18, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Waterloo varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 11 minutes of daylight; the longest day is June 21, with 15 hours, 11 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:05 AM on June 14, and the latest sunrise is 2 hours, 10 minutes later at 8:15 AM on November 4. The earliest sunset is at 5:10 PM on December 8, and the latest sunset is 4 hours, 7 minutes later at 9:17 PM on June 27.
Daylight saving time (DST) is observed in Waterloo during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.
Sunrise & Sunset with Twilight and Daylight Saving Time
Waterloo experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.5 months, from June 2 to September 17, during which time the comfort level is muggy, oppressive, or miserable at least 9% of the time. The muggiest day of the year is July 27, with muggy conditions 36% of the time.
The least muggy day of the year is December 9, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
The average hourly wind speed in Waterloo experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 7.4 months, from October 9 to May 21, with average wind speeds of more than 5.4 miles per hour. The windiest day of the year is January 15, with an average hourly wind speed of 6.9 miles per hour.
The calmer time of year lasts for 4.6 months, from May 21 to October 9. The calmest day of the year is August 4, with an average hourly wind speed of 4.0 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Waterloo varies throughout the year.
The wind is most often from the south for 1.5 months, from August 23 to October 6, with a peak percentage of 32% on October 3. The wind is most often from the west for 11 months, from October 6 to August 23, with a peak percentage of 45% on January 1.
The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.
The brighter period of the year lasts for 3.7 months, from May 4 to August 25, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is July 1, with an average of 6.9 kWh.
The darker period of the year lasts for 3.4 months, from November 3 to February 13, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 19, with an average of 1.6 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Waterloo are 41.432 deg latitude, -85.020 deg longitude, and 899 ft elevation.
The topography within 2 miles of Waterloo is essentially flat, with a maximum elevation change of 89 feet and an average elevation above sea level of 902 feet. Within 10 miles is essentially flat (262 feet). Within 50 miles contains only modest variations in elevation (636 feet).
The area within 2 miles of Waterloo is covered by cropland (97%), within 10 miles by cropland (94%), and within 50 miles by cropland (89%).
This report illustrates the typical weather in Waterloo, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 6 weather stations near enough to contribute to our estimation of the temperature and dew point in Waterloo.
For each station, the records are corrected for the elevation difference between that station and Waterloo according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Waterloo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Waterloo and a given station.
The stations contributing to this reconstruction are: Smith Field (60%, 15 kilometers, south); Defiance Memorial Airport (10%, 50 kilometers, east); Kirsch Municipal Airport (9%, 55 kilometers, northwest); Branch County Memorial Airport (8%, 56 kilometers, north); Goshen Municipal Airport (7%, 65 kilometers, west); and Hillsdale Municipal Airport (7%, 65 kilometers, northeast).
Time zones for aiports and weather stations are provided by AskGeo.com .