Climate and Average Weather Year Round in Fort Lupton Colorado, United States
In Fort Lupton, the summers are hot and mostly clear and the winters are very cold, dry, and partly cloudy. Over the course of the year, the temperature typically varies from 18°F to 89°F and is rarely below 2°F or above 97°F.
Based on the tourism score, the best time of year to visit Fort Lupton for warm-weather activities is from mid June to early September.
Climate in Fort Lupton
Average Temperature in Fort Lupton
The hot season lasts for 3.2 months, from June 7 to September 14, with an average daily high temperature above 79°F. The hottest day of the year is July 13, with an average high of 89°F and low of 59°F.
The cold season lasts for 3.2 months, from November 20 to February 26, with an average daily high temperature below 51°F. The coldest day of the year is December 30, with an average low of 18°F and high of 41°F.
Average High and Low Temperature in Fort Lupton
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 Fort Lupton
In Fort Lupton, 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 Fort Lupton begins around June 3 and lasts for 5.0 months, ending around November 1. On September 12, 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 November 1 and lasts for 7.0 months, ending around June 3. On March 15, 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 in Fort Lupton
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Fort Lupton 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 December 16.
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 Fort Lupton changes throughout the year.
Rain alone is the most common for 9.0 months, from February 20 to November 20. The highest chance of a day with rain alone is 27% on May 23.
Snow alone is the most common for 3.0 months, from November 20 to February 20. The highest chance of a day with snow alone is 5% on December 29.
Daily Chance of Precipitation in Fort Lupton
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. Fort Lupton experiences some seasonal variation in monthly rainfall.
The rainy period of the year lasts for 7.5 months, from March 13 to October 30, 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 4.5 months, from October 30 to March 13. The least rain falls around December 26, with an average total accumulation of 0.1 inches.
Average Monthly Rainfall in Fort Lupton
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. Fort Lupton experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 6.5 months, from October 10 to April 25, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around March 19, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 5.5 months, from April 25 to October 10. The least snow falls around July 17, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall in Fort Lupton
The length of the day in Fort Lupton varies significantly over the course of the year. In 2021, the shortest day is December 21, with 9 hours, 19 minutes of daylight; the longest day is June 20, with 15 hours, 2 minutes of daylight.
Hours of Daylight and Twilight in Fort Lupton
The earliest sunrise is at 5:29 AM on June 14, and the latest sunrise is 2 hours, 5 minutes later at 7:34 AM on November 6. The earliest sunset is at 4:33 PM on December 7, and the latest sunset is 3 hours, 59 minutes later at 8:32 PM on June 27.
Daylight saving time (DST) is observed in Fort Lupton during 2021, starting in the spring on March 14, lasting 7.8 months, and ending in the fall on November 7.
Sunrise & Sunset with Twilight and Daylight Saving Time in Fort Lupton
The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.
Moon Rise, Set & Phases in Fort Lupton
The perceived humidity level in Fort Lupton, 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 in Fort Lupton
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Fort Lupton experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 5.5 months, from November 20 to May 2, with average wind speeds of more than 8.1 miles per hour. The windiest day of the year is January 18, with an average hourly wind speed of 9.5 miles per hour.
The calmer time of year lasts for 6.6 months, from May 2 to November 20. The calmest day of the year is August 19, with an average hourly wind speed of 6.8 miles per hour.
Average Wind Speed in Fort Lupton
The predominant average hourly wind direction in Fort Lupton varies throughout the year.
The wind is most often from the east for 1.3 months, from July 1 to August 10, with a peak percentage of 32% on July 30. The wind is most often from the west for 11 months, from August 10 to July 1, with a peak percentage of 60% on January 1.
Wind Direction in Fort Lupton
Best Time of Year to Visit
To characterize how pleasant the weather is in Fort Lupton 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 Fort Lupton for general outdoor tourist activities is from mid June to early September, with a peak score in the first week of July.
Tourism Score in Fort Lupton
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 Fort Lupton for hot-weather activities is from late June to mid August, with a peak score in the second week of July.
Beach/Pool Score in Fort Lupton
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 Fort Lupton typically lasts for 5.3 months (160 days), from around April 30 to around October 8, rarely starting before April 11 or after May 18, and rarely ending before September 17 or after October 27.
Time Spent in Various Temperature Bands and the Growing Season in Fort Lupton
Based on growing degree days alone, the first spring blooms in Fort Lupton should appear around March 28, only rarely appearing before March 13 or after April 15.
Growing Degree Days in Fort Lupton
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 3 to February 10, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest day of the year is December 21, with an average of 2.3 kWh.
Average Daily Incident Shortwave Solar Energy in Fort Lupton
For the purposes of this report, the geographical coordinates of Fort Lupton are 40.085 deg latitude, -104.813 deg longitude, and 4,905 ft elevation.
The topography within 2 miles of Fort Lupton contains only modest variations in elevation, with a maximum elevation change of 141 feet and an average elevation above sea level of 4,916 feet. Within 10 miles also contains only modest variations in elevation (472 feet). Within 50 miles contains only modest variations in elevation (9,928 feet).
The area within 2 miles of Fort Lupton is covered by cropland (52%), grassland (30%), and shrubs (14%), within 10 miles by grassland (44%) and cropland (35%), and within 50 miles by grassland (39%) and cropland (21%).
This report illustrates the typical weather in Fort Lupton, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Fort Lupton.
For each station, the records are corrected for the elevation difference between that station and Fort Lupton 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 Fort Lupton is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Fort Lupton and a given station.
The stations contributing to this reconstruction are: Erie Municipal (KEIK, 44%, 22 kilometers, west); Denver International Airport (KDEN, 23%, 31 kilometers, southeast); Greeley-Weld County Airport (KGXY, 17%, 42 kilometers, north); and Fort Collins-Loveland Municipal Airport (KFNL, 16%, 44 kilometers, northwest).
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Time zones for airports and weather stations are provided by AskGeo.com .