Ogden, UT Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Ogden, Utah.
Gardening in Ogden
Northern Utah's railroad city has blue-collar roots and Ogden Canyon views. The Weber River valley provides fertile growing ground at the foot of the Wasatch.
Slightly cooler than Salt Lake City due to its northern location and canyon exposure. Zone 6b with 173 frost-free days. The valley floor is productive; the benches above the city are drier and more exposed. Mountain breezes provide natural air circulation that reduces disease pressure.
Ogden's revitalized 25th Street connects the city's railroad heritage to its growing food scene. The Union Station farmers market and the Ogden Nature Center prove that northern Utah grows more than just snow.
What This Means for Ogden Gardeners
The average last spring frost in Ogden is around April 20, and the average first fall frost arrives around October 10. That gives you approximately 173 frost-free days to work with.
A solid, workable season. Most standard vegetable varieties have enough time to mature, though the longest-season crops (like sweet potatoes at 90+ days or large watermelons at 85+ days) need to be started early and chosen carefully. Indoor seed starting isn't optional — it's how you buy the extra weeks that make the difference between a good harvest and a great one.
These dates are based on NOAA 30-year Climate Normal data for the Ogden area. Your actual frost dates could shift 2-3 weeks in either direction in any given year. Learn more about our data sources.
What to Grow in Ogden
Ogden's 173-day season gives you plenty of time for most vegetables with good planning. Start warm-season crops indoors to maximize your window. Cool-season crops thrive in your spring and fall shoulder seasons. Recommended starting points: tomatoes, peppers, lettuce, carrots, beans, broccoli, garlic, and basil.
See the full Utah planting guide for all 40 plants: Utah Planting Calendar. Or enter your zip code for exact planting dates personalized to Ogden.
More About Zone 6B
Ogden is in USDA Hardiness Zone 6B, which means average annual extreme minimum temperatures between -5°F to 0°F. View the full Zone 6B planting guide.
See the complete planting calendar for Utah: Utah Planting Calendar.
Other Cities in Utah
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Ogden area. They represent historical averages, not predictions. In any given year, the actual last frost could be 2-3 weeks earlier or later. Microclimates within Ogden (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start warm-season seeds indoors 6-8 weeks before your last frost (April 20) to maximize your 173-day window. Direct sow cold-hardy crops like peas and lettuce 3-4 weeks before last frost. Every week of early indoor starting matters at this season length. Enter your zip code for exact dates.