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Rule Morning Frost

Morning Frost Forecast for Inari, Finnish Lapland

Inari, Lapland, Finland

Lake Inari supplies island-dotted horizons, winter ice patterns, and dark northern skies; autumn mist often separates the wooded shores at dawn.

Currently

Real-time conditions
Soil Temperature5.8°C
Dew Point-2.8°C (low dew point)
Wind Speed1.7m/s (calm conditions)
Cloud Cover96%

Upcoming Opportunities

When all conditions match, PhotoWeather marks an opportunity window.

Times shown in Europe/Helsinki

No opportunities in the next 14 days

See which requirements block the most forecast hours below.

Most common blockers (95-hour forecast)

  • Frost Probability100% of hours
  • Time Window88% of hours
  • Wind Speed79% of hours

How this forecast is evaluated

See which weather signals PhotoWeather uses to identify Morning Frost conditions across Finnish Lapland. The requirements and hourly values below show how those signals apply at Inari.

Explore Morning Frost conditions across Finnish Lapland →

Recorded match history

Completed PhotoWeather forecast matches recorded for this exact rule at Inari during the last 365 days.

Last 30 days
0
recorded matching windows
Last 90 days
0
recorded matching windows
Last 365 days
10
recorded matching windows · 62% average confidence
Most frequent recorded start hour

07:00 local time, shared by 4 of 10 matches recorded in the last 365 days.

These figures use completed PhotoWeather MatchEvent records from the previous 365 days only. They describe recorded forecast matches, not observations, climatological probability, or a guarantee of future conditions.

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95-hour requirements breakdown

When available, the detailed table below covers only the stated 95-hour horizon (typically 72–168 hours, depending on available hourly data). Opportunity records above span the next 14 days, so this table does not explain that entire 14-day period.

What passed or failed, hour by hour
0matching hours in the next 95 hours
AND logic: all conditions required
Meets requirement
Misses requirement
Time
Europe/Helsinki
Time Window
Sunrise -45m to +90m
Frost Probability
≥ 60.0%
Wind Speed
≤ 1.5m/s
Sat, Sep 5
23:003%6m/s
Sun, Sep 6
24:003%5.7m/s
01:002.8%5.4m/s
02:0029%5m/s
03:0029%5m/s
04:0029%4.9m/s
05:0024%4.7m/s
06:0024%4.3m/s
07:0026%4.1m/s
08:0031%4m/s
09:0029%4.5m/s
10:0033%5.4m/s
11:0031%5.3m/s
12:0031%4.9m/s
13:0031%4.6m/s
14:0031%4.5m/s
15:0031%4.5m/s
16:003%4.4m/s
17:003.2%4.1m/s
18:003.2%3.7m/s
19:003.4%3.5m/s
20:003.4%3.2m/s
21:0035%2.8m/s
22:0037%2.3m/s
23:0037%1.9m/s
Mon, Sep 7
24:0039%1.7m/s
01:0039%1.5m/s
02:0039%1.5m/s
03:0040%1.3m/s
04:0036%1.1m/s
05:0047%0.7m/s
06:0047%0.64m/s
07:0045%0.82m/s
08:0052%0.59m/s
09:0054%0.95m/s
10:0052%1.5m/s
11:0050%1.9m/s
12:0048%2.3m/s
13:0048%2.6m/s
14:0045%2.7m/s
15:004.2%3.1m/s
16:004.2%3.4m/s
17:003.4%3.8m/s
18:003.2%3.8m/s
19:003.2%3.3m/s
20:003.4%3.4m/s
21:003.2%4.3m/s
22:003%3.7m/s
23:003%3.2m/s
Tue, Sep 8
24:003%3.9m/s
01:002.3%4.4m/s
02:001.2%4.9m/s
03:001.2%4.9m/s
04:001.4%4.2m/s
05:001.2%4.7m/s
06:000.8%4.6m/s
07:000.8%4.5m/s
08:001%4.1m/s
09:001%3.3m/s
10:001.2%2.5m/s
11:001.4%1.5m/s
12:001.4%1.4m/s
13:001.2%1.7m/s
14:001%2.8m/s
15:001%3.8m/s
16:001%3.2m/s
17:001%3.7m/s
18:000.8%4.5m/s
19:000.8%4.2m/s
20:000.8%4.5m/s
21:000.8%4.5m/s
22:001%4.1m/s
23:001%4.1m/s
Wed, Sep 9
24:000.8%4.9m/s
01:000.6%6.4m/s
02:000.6%6m/s
03:000.6%6.2m/s
04:001%7.6m/s
05:001%7.3m/s
06:001%6.5m/s
07:001.2%5.6m/s
08:001%5.7m/s
09:001%5.8m/s
10:001.5%5.1m/s
11:002.8%4.3m/s
12:000%3.5m/s
13:000%3.1m/s
14:000%2.7m/s
15:000%2.3m/s
16:002%1.9m/s
17:002.1%1.6m/s
18:002.1%1.2m/s
19:002.2%0.99m/s
20:003.3%0.8m/s
21:003.8%0.61m/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
Europe/Helsinki
Dew Point
°C
Surface Temperature
°C
Temperature
°C
Time Window
Total Cloud Coverage
%
Vapor Pressure Deficit
kPa
Mon, Sep 7 Sunrise 05:52 Sunset 20:25
24:00
-2.8°C 5.8°C 4°C - 96% 0.31kPa
01:00
-2.9°C 5.7°C 4°C - 97% 0.32kPa
02:00
-3.2°C 5.5°C 3.9°C - 94% 0.33kPa
03:00
-3°C 5.4°C 3.7°C - 73% 0.31kPa
04:00
-2.8°C 5.2°C 2.4°C - 60% 0.22kPa
05:00
-2.9°C 4.9°C 0.7°C - 5% 0.15kPa
06:00
-3°C 4.9°C 0.05°C - 5% 0.12kPa
07:00
-2.9°C 4.8°C 0.72°C - 5% 0.15kPa
08:00
-2.7°C 4.8°C 2.7°C - 5% 0.24kPa
09:00
-2.7°C 4.8°C 4.5°C - 5% 0.34kPa
10:00
-3°C 4.8°C 5.7°C - 5% 0.42kPa
11:00
-3.1°C 4.8°C 6.5°C - 5% 0.48kPa
12:00
-3.1°C 5.1°C 7.2°C - 5% 0.53kPa
13:00
-3°C 5.5°C 8°C - 5% 0.58kPa
14:00
-2.8°C 5.9°C 8.6°C - 5% 0.62kPa
15:00
-2.3°C 6.1°C 9.2°C - 5% 0.65kPa
16:00
-1.9°C 6.6°C 9.4°C - 10% 0.65kPa
17:00
-1.2°C 6.8°C 9.4°C - 34% 0.62kPa
18:00
-0.2°C 6.9°C 8.9°C - 89% 0.54kPa
19:00
-0.2°C 7°C 8°C - 100% 0.47kPa
20:00
-0.3°C 7.1°C 7°C - 100% 0.4kPa
21:00
0.2°C 7°C 6.6°C - 100% 0.35kPa
22:00
1.6°C 7°C 5.7°C - 100% 0.23kPa
23:00
0.8°C 6.9°C 5.9°C - 100% 0.28kPa
Tue, Sep 8 Sunrise 05:56 Sunset 20:20
24:00
1°C 6.8°C 5.8°C - 100% 0.26kPa
01:00
2°C 6.7°C 5.2°C - 100% 0.18kPa
02:00
3.1°C 6.6°C 4.9°C - 100% 0.1kPa
03:00
4°C 6.5°C 5.2°C - 100% 0.07kPa
04:00
4.4°C 6.4°C 5.6°C - 100% 0.07kPa
05:00
4.6°C 6.4°C 5.8°C - 100% 0.07kPa
06:00
4.7°C 6.4°C 5.7°C - 100% 0.06kPa
07:00
5°C 6.4°C 5.9°C - 100% 0.06kPa
08:00
5.2°C 6.3°C 6.1°C - 100% 0.06kPa
09:00
5.5°C 6.3°C 6.3°C - 100% 0.06kPa
10:00
5.8°C 6.3°C 6.6°C - 100% 0.05kPa
11:00
6°C 6.4°C 6.7°C - 100% 0.05kPa
12:00
6.4°C 6.4°C 7.3°C - 100% 0.06kPa
13:00
6.6°C 6.5°C 7.2°C - 100% 0.04kPa
14:00
6.4°C 6.6°C 6.7°C - 100% 0.02kPa
15:00
6°C 6.6°C 6.3°C - 100% 0.02kPa
16:00
6°C 6.6°C 6.3°C - 100% 0.02kPa
17:00
6.4°C 6.6°C 6.6°C - 100% 0.01kPa
18:00
6.5°C 6.6°C 6.7°C - 100% 0.02kPa
19:00
6.7°C 6.6°C 6.9°C - 100% 0.01kPa
20:00
7°C 6.7°C 7.2°C - 100% 0.01kPa
21:00
7.1°C 6.7°C 7.3°C - 100% 0.02kPa
22:00
7.4°C 6.7°C 7.6°C - 100% 0.01kPa
23:00
7.5°C 6.8°C 7.7°C - 100% 0.01kPa
Wed, Sep 9 Sunrise 06:00 Sunset 20:16
24:00
6.9°C 6.9°C 7.2°C - 100% 0.02kPa
01:00
5.9°C 6.9°C 6.3°C - 100% 0.03kPa
02:00
5.7°C 6.9°C 6.3°C - 100% 0.04kPa
03:00
5.5°C 6.8°C 6.3°C - 100% 0.05kPa
04:00
4.9°C 6.8°C 6°C - 100% 0.07kPa
05:00
4.9°C 6.7°C 6.1°C - 100% 0.07kPa
06:00
4.9°C 6.6°C 6.2°C - 100% 0.08kPa
07:00
4.8°C 6.6°C 6.2°C - 100% 0.08kPa
08:00
4.9°C 6.6°C 6.2°C - 100% 0.09kPa
09:00
4.8°C 6.5°C 6.2°C - 100% 0.09kPa
10:00
4.7°C 7.1°C 7.6°C - 99% 0.19kPa
11:00
4.4°C 7.7°C 8.9°C - 99% 0.31kPa
12:00
3.9°C 8.4°C 10°C - 98% 0.44kPa
13:00
4°C 8.3°C 9°C - 86% 0.34kPa
14:00
3.9°C 8.2°C 7.7°C - 73% 0.24kPa
15:00
3.8°C 8.2°C 6.5°C - 61% 0.16kPa
16:00
3.7°C 8°C 6.4°C - 74% 0.16kPa
17:00
3.6°C 7.8°C 6.3°C - 87% 0.16kPa
18:00
3.5°C 7.6°C 6.2°C - 100% 0.17kPa
19:00
3.4°C 7.5°C 6.4°C - 76% 0.18kPa
20:00
3.3°C 7.4°C 6.5°C - 51% 0.19kPa
21:00
3.2°C 7.3°C 6.6°C - 27% 0.2kPa
22:00
3°C 7°C 5.8°C - 19% 0.16kPa
23:00
2.8°C 6.7°C 5°C - 12% 0.12kPa
How to read: these inputs help produce the derived score; they are not requirements by themselves.

How this forecast is made

Opportunities are threshold-based signals: PhotoWeather checks whether forecast conditions match the rules for a photography scenario. They are planning guidance, not guarantees. Forecasts can change as new model runs arrive, and confidence generally decreases farther into the forecast horizon, so recheck conditions before travelling.

The weather forecast foundation comes through Open-Meteo , which aggregates models from weather agencies. PhotoWeather applies condition-specific thresholds and derived calculations; not every condition uses every model or data input.

Forecast generated

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