—
trade threshold rain days
>0.04 in/day
incl. — work-stopping heavy rain days →
—
work-stopping subset of rainy days
>0.6 in/day
—
work-stopping snow days
—
high-wind days at this site
≥19 mph impact
—
Days over 95°F
Reduces ideal days
—
Non-workable: —
|
Pristine: --
Recency-weighted NOAA average · physical work feasibility for this trade
Project Workability
— workable · — non-workable of — days
—% of days workable for this trade
Contingency: —%
Recency-weighted historical average
| Month |
Heavy Rain Days |
Freeze/Cold Days |
Snow Days |
Wind Days |
Workable Days |
Workable % |
Event Risk |
Event Risk = work-stopping days (heavy rain + freeze + heavy snow).
Monthly Work-Stopping Risk Heatmap
Total work-stopping days per month (Heavy Rain + Extreme Cold + Heavy Snow)
Weather Threshold Definitions
🏗 Work Feasibility Tiers — Note: Ideal Days are a subset of Workable Days (not additive)
Important: Thresholds are generalized industry approximations. "Workable" means physically feasible under general construction standards — it does not mean contractually acceptable. Your specific contract or owner requirements may define acceptable working conditions more strictly. Always verify day-count claims against your actual contract terms.
WORKABLE DAYS
Construction feasible with appropriate precautions
Temperature: 20–109°F · Precipitation: <0.6 in/day · Wind Speed: <37 mph
Showing trade-specific thresholds — these are the exact rules used to count your workable days
IDEAL DAYS (subset of Workable)
Perfect conditions, optimal quality with no special precautions
Temperature: 50–100°F · Precipitation: <0.2 in/day · Wind Speed: <12 mph
For quality-critical work (painting, curing), low ideal days means constant monitoring and precautions required
Precipitation Metrics
RAINY DAYS
Any measurable precipitation
Threshold: >1mm/day (>0.04 in)
Purpose: Statistical tracking
HEAVY RAIN DAYS
Work-stopping rainfall
Threshold: >15mm/day (>0.6 in)
Impact: Outdoor work typically stops
MEASURABLE SNOW DAYS
Threshold: >1mm water equiv. ≈ ~0.4 in snow depth
Heavy Snow: >10mm water equiv. ≈ ~4 in snow depth
Note: Uses water equivalent (mm), not depth
Temperature Metrics
FREEZING DAYS
Overnight low ≤32°F
Impact: Heaters, cold-weather materials required
Freezing ≠ non-workable — many freezing days are workable once daytime temps rise
COLD-WEATHER METHODS REQUIRED
Threshold: 0°F to 25°F
Impact: Accelerators, hot water mix (120°F), heated enclosures, insulated curing blankets
EXTREME COLD STOPPAGE
Threshold: Minimum ≤0°F
Impact: Work stoppage required — even protected concrete work unsafe/unreliable
EXTREME HEAT DAYS
Threshold: Maximum ≥100°F (38°C)
Impact: Heat illness risk, reduced productivity, OSHA safety concerns
Wind Metrics
ELEVATED WIND (monitoring threshold)
Threshold: ≥30 km/h (≥19 mph)
Impact: Crane/scaffolding restrictions — work proceeds with caution
Not counted as work stoppage
WORK-STOPPING HIGH WIND
Threshold: ≥60 km/h (≥37 mph) general construction
Template-specific: varies by work type (roofing, painting, etc.)
Impact: True work stoppage — safety hazard
Wind Tiers Explained: Days with 19–37 mph winds are elevated wind for monitoring but still workable with restrictions. Days ≥37 mph (or template-specific threshold) are true work stoppage. Template-specific thresholds (roofing ≥19 mph, painting ≥16 mph) are more conservative.
Data sources: NOAA weather stations (temp, precipitation, snow) · ERA5 global reanalysis (wind, remote locations) · Open-Meteo archive API · Visual Crossing snow data. Trade-specific thresholds sourced from ACI 306 (concrete), OSHA guidelines, SMACNA standards, and industry best practices.
Note: These thresholds are based on construction industry standards and OSHA guidelines. Actual work feasibility depends on specific project requirements, materials, and equipment.
Your project has — workable days.
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