Historical weather data, all-time temperature records, and monthly climate averages for Northglenn, CO. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Northglenn lands in that classic Colorado in-between zone — expect a high near 61° and an overnight low around 32°, with just a 10% chance of snow. The date has seen some wild swings over 40 years of records, from a balmy 81° back in 1991 to a brutal 15° low as recently as 2023. Most years, though, it's a mild spring afternoon.
Northglenn's weather has real teeth on both ends — the thermometer has hit 110° in August 2008 and bottomed out at -24° in December 1990, a 134-degree spread that tells you everything about life on the Colorado Front Range. The snowiest single day on record dropped 21.8 inches on December 21, 2006, while a single August storm in 1992 dumped 2.45 inches of rain.
Summer is the main event here, with highs peaking around 91° the week of July 9–15, while January and December both average a mild 47° for highs — cold nights, but comfortable afternoons. Late April is the wettest stretch of the year, averaging 0.66 inches of precipitation the week of April 23–29, so spring travelers should pack a layer. If you want dry and warm, aim for late June through early September.