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Rule Morning Frost

Bretton Woods - Morning Frost - New England, USA

Bretton Woods, New Hampshire, United States

Frost crystals on calm, cold mornings near sunrise

No opportunities right now
Here’s what usually blocks matches

No Morning Frost opportunities in the next 14 days

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Rule requirements (key thresholds)
Time Window · Sunrise -45m to +90m Frost Probability · ≥ 60.0% Wind Speed · ≤ 1.5m/s

Tip: Scroll down to the 72-hour table to see exactly which condition fails hour by hour.

Most common blockers (next 72 hours)
Frost Probability 100% failing
Time Window 88% failing
Wind Speed 54% failing

Currently

Real-time conditions
Soil Temperature15.1°C
Dew Point12.9°C (moderate dew point)
Wind Speed2.3m/s (calm conditions)
Cloud Cover0%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in America/New_York

No opportunities in the next 10 days

See the blocker timeline below to understand which conditions are preventing matches.

What this forecast looks for

Plain-language explanation from the rule

This forecast predicts the first frost events that transform New England's fall foliage into crystalline masterpieces. We track overnight temperatures, dewpoint, and wind conditions to identify when frost will coat leaves, grasses, and stone walls with sparkling ice crystals.

The first hard frost of autumn is a cherished event in New England—it triggers the final phase of fall color and creates magical dawn conditions where ice crystals catch golden light. The region's iconic stone walls, covered bridges, and sugar maples take on new dimension when dusted with frost.

What makes New England frost photography exceptional:

  • Foliage enhancement - Frost crystals on red and orange leaves create otherworldly textures and highlights
  • Stone wall character - New England's ubiquitous dry-stacked stone walls gain definition and drama when frost-covered
  • Sugar maple groves - Vermont and New Hampshire maple stands combine brilliant color with frost textures
  • Historic elements - Colonial-era buildings, covered bridges, and farmsteads gain timeless quality under frost

Best conditions occur on clear, calm nights in October when temperatures drop to 28-32°F. Frost melts quickly after sunrise, so arrive before dawn for frost plus golden hour light. Protected valleys and hollows accumulate frost more heavily than exposed hilltops.

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72-hour requirements breakdown

What passed or failed, hour by hour
0matching hours in the next 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
America/New_York
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Tue, Jul 7
09:000%1.6m/s
10:000%1.8m/s
11:000%2.2m/s
12:000%1.9m/s
13:000%2.2m/s
14:000%2.2m/s
15:000%2.1m/s
16:000%2.1m/s
17:000%2.2m/s
18:000%2.1m/s
19:000%2.2m/s
20:000%2.2m/s
21:000%2.3m/s
22:000%2m/s
23:000%1.8m/s
Wed, Jul 8
24:000%1.3m/s
01:000%0.38m/s
02:000%0.37m/s
03:000%0.57m/s
04:000%0.71m/s
05:000%0.75m/s
06:000%0.23m/s
07:000%0.95m/s
08:000%1.8m/s
09:000%2.2m/s
10:000%2.3m/s
11:000%2.4m/s
12:000%2.4m/s
13:000%2.3m/s
14:000%2m/s
15:000%2.3m/s
16:000%2.2m/s
17:000%1.7m/s
18:000%1.6m/s
19:000%0.39m/s
20:000%0.72m/s
21:000%0.9m/s
22:000%0.96m/s
23:000%1.2m/s
Thu, Jul 9
24:000%1.6m/s
01:000%1.6m/s
02:000%1.9m/s
03:000%1.7m/s
04:000%1.4m/s
05:000%0.56m/s
06:000%0.32m/s
07:000%0.64m/s
08:000%1.3m/s
09:000%1.7m/s
10:000%2.4m/s
11:000%2.7m/s
12:000%2.4m/s
13:000%2.5m/s
14:000%2.8m/s
15:000%2.7m/s
16:000%1.9m/s
17:000%2m/s
18:000%1.9m/s
19:000%2m/s
20:000%1.6m/s
21:000%0.87m/s
22:000%0.33m/s
23:000%0.31m/s
Fri, Jul 10
24:000%1.4m/s
01:000%0.22m/s
02:000%0.45m/s
03:000%0.92m/s
04:000%0.73m/s
05:000%1.5m/s
06:000%1.4m/s
07:000%1.4m/s
08:000%1.1m/s
09:000%2.1m/s
10:000%2.4m/s
11:000%2.6m/s
12:000%2.4m/s
13:000%2.3m/s
14:000%2m/s
15:000%1.7m/s
16:000%1.4m/s
17:000%1.2m/s
18:000%1.1m/s
19:000%1.1m/s
20:000%1.1m/s
21:000%0.96m/s
22:000%0.81m/s
23:000%0.67m/s
Sat, Jul 11
24:000%0.72m/s
01:000%0.77m/s
02:000%0.81m/s
03:000%1.4m/s
04:000%1.9m/s
05:000%2.5m/s
06:000%2.8m/s
07:000%3.1m/s
How to read: colored cells show whether each predicate requirement is met; highlighted rows mean the full rule matched (an opportunity).

What does Frost Probability mean?

Inputs that drive the score

This derived score summarizes multiple raw weather signals. The table below shows the supporting inputs hour by hour, so you can see what's pushing the score up or down.

Time
America/New_York
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Wed, Jul 8 Sunrise 05:10 Sunset 20:30
10:00
13°C 15°C 21°C - 0% 1kPa
11:00
12°C 15°C 22°C - 0% 1.3kPa
12:00
12°C 15°C 23°C - 45% 1.5kPa
13:00
11°C 16°C 24°C - 88% 1.7kPa
14:00
11°C 16°C 25°C - 100% 1.8kPa
15:00
12°C 16°C 25°C - 100% 1.7kPa
16:00
14°C 16°C 23°C - 100% 1.1kPa
17:00
14°C 16°C 23°C - 100% 1.3kPa
18:00
14°C 16°C 23°C - 48% 1.2kPa
19:00
16°C 16°C 20°C - 98% 0.58kPa
20:00
14°C 16°C 19°C - 69% 0.57kPa
21:00
13°C 16°C 17°C - 73% 0.39kPa
22:00
13°C 16°C 16°C - 100% 0.35kPa
23:00
13°C 16°C 16°C - 100% 0.34kPa
Thu, Jul 9 Sunrise 05:11 Sunset 20:30
24:00
13°C 16°C 16°C - 85% 0.34kPa
01:00
13°C 16°C 16°C - 100% 0.35kPa
02:00
13°C 16°C 16°C - 66% 0.35kPa
03:00
13°C 16°C 16°C - 92% 0.28kPa
04:00
13°C 16°C 15°C - 89% 0.24kPa
05:00
13°C 16°C 15°C - 0% 0.21kPa
06:00
14°C 16°C 16°C - 1% 0.27kPa
07:00
15°C 16°C 19°C - 5% 0.51kPa
08:00
15°C 16°C 21°C - 3% 0.83kPa
09:00
14°C 16°C 23°C - 0% 1.1kPa
10:00
14°C 16°C 24°C - 88% 1.3kPa
11:00
15°C 16°C 24°C - 42% 1.4kPa
12:00
15°C 16°C 25°C - 12% 1.6kPa
13:00
15°C 17°C 26°C - 97% 1.7kPa
14:00
14°C 17°C 27°C - 68% 1.9kPa
15:00
15°C 17°C 26°C - 92% 1.7kPa
16:00
15°C 17°C 25°C - 98% 1.4kPa
17:00
16°C 17°C 24°C - 96% 1.2kPa
18:00
18°C 17°C 21°C - 42% 0.52kPa
19:00
18°C 18°C 20°C - 100% 0.24kPa
20:00
17°C 17°C 17°C - 42% 0.05kPa
21:00
16°C 17°C 17°C - 80% 0.07kPa
22:00
16°C 17°C 16°C - 100% 0.09kPa
23:00
16°C 17°C 17°C - 100% 0.1kPa
Fri, Jul 10 Sunrise 05:12 Sunset 20:29
24:00
15°C 17°C 16°C - 100% 0.04kPa
01:00
16°C 17°C 16°C - 100% 0.02kPa
02:00
16°C 17°C 16°C - 100% 0.06kPa
03:00
16°C 17°C 16°C - 100% 0.06kPa
04:00
16°C 17°C 16°C - 100% 0.04kPa
05:00
16°C 17°C 16°C - 100% 0.03kPa
06:00
16°C 17°C 16°C - 100% 0.02kPa
07:00
16°C 17°C 16°C - 100% 0.02kPa
08:00
16°C 16°C 16°C - 99% 0.03kPa
09:00
17°C 16°C 18°C - 100% 0.16kPa
10:00
17°C 16°C 19°C - 100% 0.24kPa
11:00
17°C 16°C 19°C - 100% 0.19kPa
12:00
18°C 16°C 18°C - 100% 0.08kPa
13:00
18°C 16°C 19°C - 100% 0.14kPa
14:00
17°C 17°C 19°C - 100% 0.29kPa
15:00
16°C 17°C 18°C - 85% 0.21kPa
16:00
15°C 17°C 16°C - 69% 0.15kPa
17:00
14°C 18°C 15°C - 54% 0.1kPa
18:00
13°C 17°C 14°C - 36% 0.09kPa
19:00
13°C 17°C 13°C - 18% 0.08kPa
20:00
12°C 17°C 13°C - 0% 0.08kPa
21:00
12°C 17°C 12°C - 20% 0.08kPa
22:00
11°C 17°C 12°C - 39% 0.08kPa
23:00
11°C 16°C 12°C - 59% 0.07kPa
Sat, Jul 11 Sunrise 05:12 Sunset 20:29
24:00
12°C 16°C 13°C - 49% 0.15kPa
01:00
13°C 16°C 15°C - 39% 0.25kPa
02:00
13°C 16°C 17°C - 28% 0.36kPa
03:00
12°C 16°C 19°C - 39% 0.72kPa
04:00
11°C 16°C 21°C - 49% 1.2kPa
05:00
7.8°C 16°C 23°C - 60% 1.7kPa
06:00
7.3°C 17°C 23°C - 73% 1.9kPa
07:00
6.7°C 17°C 24°C - 87% 2kPa
08:00
6.1°C 17°C 24°C - 100% 2.1kPa
09:00
6.8°C 17°C 24°C - 68% 2kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

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