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Rule Morning Frost

Morning Frost Forecast for Ivalo, Finnish Lapland

Ivalo, Lapland, Finland

Ivalo combines the winding Ivalojoki River with low pine-covered hills, and serves as a practical base for Lake Inari’s wider ice landscapes.

Currently

Real-time conditions
Soil Temperature10.8°C
Dew Point7.8°C (moderate dew point)
Wind Speed4.1m/s (calm conditions)
Cloud Cover100%

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 Speed71% 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 Ivalo.

Explore Morning Frost conditions across Finnish Lapland →

Recorded match history

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

Last 30 days
0
recorded matching windows
Last 90 days
0
recorded matching windows
Last 365 days
5
recorded matching windows · 70% average confidence

Only 5 completed matches are recorded in the last 365 days—insufficient history to identify a reliable typical start time or month.

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
Sun, Aug 23
05:000%2.3m/s
06:000%2.6m/s
07:000%2.4m/s
08:000%2.8m/s
09:000%3.1m/s
10:000%3.8m/s
11:000%3.9m/s
12:000%3.7m/s
13:000%3.2m/s
14:000%3.5m/s
15:000%3.7m/s
16:000%3.9m/s
17:000%5.1m/s
18:000%5.1m/s
19:000%4.3m/s
20:000%3.3m/s
21:000%2.9m/s
22:000%2.8m/s
23:000%3.2m/s
Mon, Aug 24
24:000%3.3m/s
01:000%3m/s
02:000%2.9m/s
03:000%3.3m/s
04:000%2.2m/s
05:000%3m/s
06:000%4.1m/s
07:000%4m/s
08:000%3.7m/s
09:000%3.9m/s
10:000%3.7m/s
11:000%3.2m/s
12:000%2.6m/s
13:000%2.5m/s
14:000%1.6m/s
15:000%1.1m/s
16:000%0.74m/s
17:000%1.1m/s
18:000%1.6m/s
19:000%0.92m/s
20:000%0.25m/s
21:000%0.79m/s
22:000%1.1m/s
23:000%1.1m/s
Tue, Aug 25
24:000%1.2m/s
01:000%1.8m/s
02:000%2.3m/s
03:000%2.4m/s
04:000%2.3m/s
05:000%2.8m/s
06:000%2.8m/s
07:000%2.3m/s
08:000%2.2m/s
09:000%2.3m/s
10:000%2.3m/s
11:000%3m/s
12:000%3.6m/s
13:000%3.4m/s
14:000%3.7m/s
15:000%1.8m/s
16:000%1.5m/s
17:000%1.2m/s
18:000%1.2m/s
19:000%4.4m/s
20:000%5.9m/s
21:000%6.2m/s
22:000%4.3m/s
23:000%4.5m/s
Wed, Aug 26
24:000%5.1m/s
01:000%4m/s
02:000%3.4m/s
03:000%2.7m/s
04:000%3.1m/s
05:000%3.6m/s
06:000%4m/s
07:000%3.9m/s
08:000%4.9m/s
09:000%5.4m/s
10:000%5.4m/s
11:000%5.1m/s
12:000%5m/s
13:000%4.9m/s
14:000%4.7m/s
15:000%4.4m/s
16:000%3.3m/s
17:000%2.2m/s
18:004.4%1.1m/s
19:003.6%1m/s
20:003.6%0.93m/s
21:003.6%0.85m/s
22:003.6%0.81m/s
23:003.8%0.77m/s
Thu, Aug 27
24:0039%0.73m/s
01:0047%0.7m/s
02:0052%0.67m/s
03:0056%0.64m/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, Aug 24 Sunrise 05:00 Sunset 21:20
06:00
7.8°C 11°C 10°C - 100% 0.19kPa
07:00
6.6°C 11°C 9.9°C - 90% 0.25kPa
08:00
6°C 11°C 10°C - 69% 0.29kPa
09:00
5.5°C 11°C 10°C - 8% 0.36kPa
10:00
5.3°C 11°C 11°C - 33% 0.4kPa
11:00
5.2°C 11°C 11°C - 90% 0.4kPa
12:00
5.3°C 11°C 10°C - 61% 0.38kPa
13:00
5.6°C 11°C 11°C - 100% 0.4kPa
14:00
5.9°C 11°C 11°C - 100% 0.35kPa
15:00
6.2°C 11°C 11°C - 99% 0.36kPa
16:00
6.6°C 11°C 12°C - 86% 0.42kPa
17:00
6.8°C 12°C 13°C - 61% 0.47kPa
18:00
6.9°C 12°C 13°C - 51% 0.46kPa
19:00
7.1°C 12°C 12°C - 97% 0.4kPa
20:00
7.2°C 12°C 11°C - 100% 0.33kPa
21:00
7.5°C 12°C 11°C - 100% 0.31kPa
22:00
7.4°C 12°C 11°C - 96% 0.3kPa
23:00
7.5°C 11°C 11°C - 83% 0.3kPa
Tue, Aug 25 Sunrise 05:00 Sunset 21:20
24:00
7.6°C 11°C 11°C - 99% 0.3kPa
01:00
7.5°C 11°C 11°C - 98% 0.3kPa
02:00
7.5°C 11°C 11°C - 100% 0.29kPa
03:00
7.6°C 11°C 11°C - 100% 0.29kPa
04:00
7.6°C 11°C 11°C - 100% 0.29kPa
05:00
7.5°C 11°C 11°C - 100% 0.3kPa
06:00
7.7°C 11°C 11°C - 100% 0.3kPa
07:00
8°C 11°C 11°C - 100% 0.28kPa
08:00
8.1°C 11°C 12°C - 100% 0.29kPa
09:00
8.2°C 11°C 12°C - 100% 0.35kPa
10:00
8.2°C 11°C 12°C - 100% 0.35kPa
11:00
7.9°C 11°C 13°C - 96% 0.46kPa
12:00
7.6°C 11°C 14°C - 100% 0.58kPa
13:00
7.9°C 12°C 14°C - 100% 0.58kPa
14:00
7.9°C 12°C 15°C - 100% 0.59kPa
15:00
8.5°C 12°C 13°C - 97% 0.4kPa
16:00
8.3°C 12°C 14°C - 80% 0.52kPa
17:00
8.6°C 12°C 14°C - 88% 0.46kPa
18:00
8.8°C 12°C 13°C - 94% 0.4kPa
19:00
9.2°C 12°C 13°C - 96% 0.29kPa
20:00
7.8°C 12°C 11°C - 92% 0.29kPa
21:00
7.3°C 12°C 11°C - 13% 0.29kPa
22:00
7°C 12°C 10°C - 36% 0.24kPa
23:00
7.2°C 11°C 9.4°C - 94% 0.16kPa
Wed, Aug 26 Sunrise 05:05 Sunset 21:16
24:00
5.7°C 11°C 8.5°C - 83% 0.19kPa
01:00
5.1°C 11°C 8°C - 82% 0.19kPa
02:00
5.1°C 11°C 8°C - 87% 0.19kPa
03:00
4.8°C 10°C 7.7°C - 98% 0.19kPa
04:00
3.9°C 10°C 7.7°C - 100% 0.25kPa
05:00
2.7°C 9.9°C 7.3°C - 100% 0.28kPa
06:00
2.1°C 9.7°C 7°C - 85% 0.29kPa
07:00
1.8°C 9.5°C 6.7°C - 37% 0.28kPa
08:00
0.5°C 9.3°C 6.8°C - 5% 0.36kPa
09:00
-0.3°C 9.2°C 7°C - 24% 0.4kPa
10:00
-0.4°C 9.2°C 7.7°C - 72% 0.46kPa
11:00
-0.9°C 9.2°C 8.2°C - 80% 0.52kPa
12:00
-1.1°C 9.3°C 9.1°C - 77% 0.6kPa
13:00
-1.2°C 9.7°C 9.9°C - 66% 0.66kPa
14:00
-1.1°C 9.9°C 10°C - 80% 0.7kPa
15:00
-1°C 10°C 11°C - 88% 0.73kPa
16:00
-0.1°C 9.4°C 8.2°C - 60% 0.48kPa
17:00
0.1°C 8.6°C 5.5°C - 33% 0.29kPa
18:00
-0.2°C 7.9°C 2.8°C - 5% 0.15kPa
19:00
-0.4°C 7.5°C 2.5°C - 5% 0.14kPa
20:00
-0.6°C 7.1°C 2.2°C - 5% 0.13kPa
21:00
-0.7°C 6.8°C 1.8°C - 5% 0.12kPa
22:00
-0.8°C 6.4°C 1.7°C - 5% 0.12kPa
23:00
-0.9°C 6°C 1.6°C - 5% 0.12kPa
Thu, Aug 27 Sunrise 05:09 Sunset 21:11
24:00
-1°C 5.7°C 1.6°C - 5% 0.12kPa
01:00
-0.7°C 5.7°C 3.2°C - 5% 0.19kPa
02:00
-0.5°C 5.7°C 4.9°C - 5% 0.27kPa
03:00
-0.5°C 5.7°C 6.5°C - 5% 0.38kPa
04:00
-0.3°C 6.1°C 7.8°C - 5% 0.46kPa
05:00
-0.3°C 6.5°C 9.1°C - 5% 0.56kPa
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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