Fava bean in Detroit: weekly temperatures and windows
Detailed weekly chart for this crop and place. For planting dates, see when to plant fava bean in Detroit.
Growing window for Fava bean: Mar 26 – Jun 8 (75 days)
Planting window for Fava bean: Mar 26 – Jul 3 (100 days)
Usually too cold: Jan 1 – Mar 22; Nov 9 – Dec 31
Outdoors: weekly temperatures and windows
Temperatures across the year for Detroit. Shaded bands are this plant’s ideal and tolerable daytime air ranges. Growing is daytime air suitability; Planting is sow / plant-out conditions (same colour language). Window brackets mark each stretch.
- Ideal range
- Tolerable range
- Possible min to max
- Average min to max
- Suitable
- Tolerable
- Too cold
- Too hot
Selected week · tap a week or use the arrows
Week 13 · Mar 23 – Mar 29
Average 0 to 9 °C · Possible −16 to 23 °C
Growing: too cold (inside window)
Planting: suitable
A week is in range when its average low and high sit inside the tolerance band 4 to 24 °C; it is suitable when that average range also overlaps the ideal 15 to 21 °C band and possible readings stay within 4 °C to 24 °C. Crossing a possible limit, or missing the ideal band, makes it tolerable; a possible low below 4 °C makes it tolerable. When a sowing window is calculated, weeks outside that window are uncoloured even if air is in range.
Based on average frost dates (35 seasons (1991–2025)).
- Ideal
- Tolerable
- Too cold
- Too hot
Show all 53 weeks
Cover method weekly charts
Outdoor weekly chart is above. Open a cover chart only if you grow under fleece, a cold frame, or an unheated greenhouse.
Dates for Detroit use ERA5-Land cell 42.33, -83.05. How we calculated this · Algorithm 2026-10-season-10.