Average Weather in Milliken Colorado, United States
In Milliken, the summers are hot and mostly clear and the winters are freezing, dry, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 17°F to 89°F and is rarely below 1°F or above 97°F.
Based on the tourism score, the best time of year to visit Milliken for warm-weather activities is from mid June to late August.
The hot season lasts for 3.3 months, from June 5 to September 15, with an average daily high temperature above 79°F. The hottest day of the year is July 10, with an average high of 89°F and low of 59°F.
The cold season lasts for 3.1 months, from November 21 to February 25, with an average daily high temperature below 50°F. The coldest day of the year is December 30, with an average low of 17°F and high of 40°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 Milliken, 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 Milliken begins around June 3 and lasts for 4.8 months, ending around October 29. On July 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 75% of the time, and overcast or mostly cloudy 25% of the time.
The cloudier part of the year begins around October 29 and lasts for 7.2 months, ending around June 3. On March 4, the cloudiest day of the year, the sky is overcast or mostly cloudy 47% of the time, and clear, mostly clear, or partly cloudy 53% of the time.
Cloud Cover Categories
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Milliken varies throughout the year.
The wetter season lasts 5.0 months, from April 2 to September 1, with a greater than 17% chance of a given day being a wet day. The chance of a wet day peaks at 28% on May 23.
The drier season lasts 7.0 months, from September 1 to April 2. The smallest chance of a wet day is 7% on January 24.
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 in Milliken changes throughout the year.
Rain alone is the most common for 9.1 months, from February 19 to November 22. The highest chance of a day with rain alone is 28% on May 23.
Snow alone is the most common for 2.9 months, from November 22 to February 19. The highest chance of a day with snow alone is 5% on December 12.
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. Milliken experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 7.7 months, from March 12 to November 1, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around May 16, with an average total accumulation of 1.9 inches.
The rainless period of the year lasts for 4.3 months, from November 1 to March 12. The least rain falls around December 26, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Milliken does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.
Average Liquid-Equivalent Monthly Snowfall
The length of the day in Milliken varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 18 minutes of daylight; the longest day is June 21, with 15 hours, 3 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:28 AM on June 14, and the latest sunrise is 2 hours, 3 minutes later at 7:31 AM on November 3. The earliest sunset is at 4:33 PM on December 7, and the latest sunset is 4 hours, 0 minutes later at 8:33 PM on June 27.
Daylight saving time (DST) is observed in Milliken during 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
The perceived humidity level in Milliken, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.
Humidity Comfort Levels
The average hourly wind speed in Milliken experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.5 months, from November 17 to May 1, with average wind speeds of more than 8.4 miles per hour. The windiest day of the year is January 18, with an average hourly wind speed of 10.1 miles per hour.
The calmer time of year lasts for 6.5 months, from May 1 to November 17. The calmest day of the year is August 19, with an average hourly wind speed of 6.7 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Milliken varies throughout the year.
The wind is most often from the east for 1.3 months, from July 4 to August 12, with a peak percentage of 32% on July 30. The wind is most often from the west for 11 months, from August 12 to July 4, with a peak percentage of 62% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Milliken throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Milliken for general outdoor tourist activities is from mid June to late August, with a peak score in the first week of July.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Milliken for hot-weather activities is from late June to mid August, with a peak score in the second week of July.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season in Milliken typically lasts for 5.3 months (161 days), from around April 30 to around October 9, rarely starting before April 10 or after May 18, and rarely ending before September 18 or after October 28.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in Milliken should appear around March 30, only rarely appearing before March 16 or after April 16.
Growing Degree Days
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 2.9 months, from May 9 to August 6, with an average daily incident shortwave energy per square meter above 6.8 kWh. The brightest day of the year is June 21, with an average of 7.9 kWh.
The darker period of the year lasts for 3.2 months, from November 2 to February 10, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 21, with an average of 2.3 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Milliken are 40.329 deg latitude, -104.855 deg longitude, and 4,787 ft elevation.
The topography within 2 miles of Milliken contains only modest variations in elevation, with a maximum elevation change of 207 feet and an average elevation above sea level of 4,779 feet. Within 10 miles contains only modest variations in elevation (531 feet). Within 50 miles contains significant variations in elevation (9,944 feet).
The area within 2 miles of Milliken is covered by cropland (53%) and grassland (39%), within 10 miles by cropland (62%) and grassland (22%), and within 50 miles by grassland (44%) and cropland (19%).
This report illustrates the typical weather in Milliken, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Milliken.
For each station, the records are corrected for the elevation difference between that station and Milliken 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 Milliken is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Milliken and a given station.
The stations contributing to this reconstruction are: Fort Collins-Loveland Municipal Airport (43%, 19 kilometers, northwest); Greeley-Weld County Airport (37%, 22 kilometers, northeast); and Vance Brand Airport (21%, 32 kilometers, southwest).
Time zones for aiports and weather stations are provided by AskGeo.com .