Grand Lake St Marys Seaplane Base Weather Forecast 15 Days, Weather in O12 Today
Current weather conditions and 15 day weather forecast for Grand Lake St Marys Seaplane Base, Ohio, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Grand Lake St Marys Seaplane Base
| 11 August 2026 Tuesday 22.4 ° C / 72.3°F  Patchy rain nearby |
Feels Like : 23.4 ° C / 74.1°F Humidity : % 88 Pressure : 1016 mb Wind Speed : 14.8 kmph / 9.2 miles from NNW  Visibility : 10 km Precipitation (rainfall) : 0.02 mm Cloud (%) : 73 |
15 day weather forecast for Grand Lake St Marys Seaplane Base, OH, USA
Weather Forecast for next 15 Days for Grand Lake St Marys Seaplane Base including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Grand Lake St Marys Seaplane Base, Ohio state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 11 August 2026 Tuesday |  Sunny |
20.2 ° C (68.4°F) |
26.5 ° C (79.7°F) |
22.3 ° C (72.2°F) |
% 90 | 83% | 3.9 | Sunrise:06:44 AM Sunset: 08:41 PM |
Moonrise:04:44 AM Moonset: 08:05 PM Moon Phase ( New Moon ) |
|
| 12 August 2026 Wednesday |  Mist |
18.8 ° C (65.8°F) |
28.5 ° C (83.4°F) |
21.4 ° C (70.6°F) |
% 91 | 86% | 5.8 | Sunrise:06:45 AM Sunset: 08:40 PM |
Moonrise:06:06 AM Moonset: 08:40 PM Moon Phase ( New Moon ) |
|
| 13 August 2026 Thursday | Mist |
16.8 ° C (62.3°F) |
26.2 ° C (79.2°F) |
21.3 ° C (70.3°F) |
% 86 | 29% | 6.7 | Sunrise:06:46 AM Sunset: 08:38 PM |
Moonrise:07:28 AM Moonset: 09:08 PM Moon Phase ( New Moon ) |
|
| 14 August 2026 Friday | Sunny |
16.4 ° C (61.5°F) |
25.4 ° C (77.7°F) |
20.7 ° C (69.2°F) |
% 84 | 13% | 7.8 | Sunrise:06:47 AM Sunset: 08:37 PM |
Moonrise:08:46 AM Moonset: 09:34 PM Moon Phase ( Waxing Crescent ) |
|
| 15 August 2026 Saturday | Sunny |
14.2 ° C (57.5°F) |
24 ° C (75.2°F) |
19.2 ° C (66.6°F) |
% 76 | 9% | 6 | Sunrise:06:48 AM Sunset: 08:36 PM |
Moonrise:10:02 AM Moonset: 09:58 PM Moon Phase ( Waxing Crescent ) |
|
| 16 August 2026 Sunday | Sunny |
19.4 ° C (67°F) |
31.3 ° C (88.3°F) |
24.6 ° C (76.2°F) |
% 79 | 9% | 8 | Sunrise:06:49 AM Sunset: 08:34 PM |
Moonrise:11:15 AM Moonset: 10:23 PM Moon Phase ( Waxing Crescent ) |
|
| 17 August 2026 Monday | Patchy rain nearby |
17.1 ° C (62.8°F) |
23.8 ° C (74.8°F) |
20.2 ° C (68.4°F) |
% 86 | 30% | 5 | Sunrise:06:50 AM Sunset: 08:33 PM |
Moonrise:12:27 PM Moonset: 10:50 PM Moon Phase ( Waxing Crescent ) |
|
| 18 August 2026 Tuesday | Sunny |
14.5 ° C (58.2°F) |
25.1 ° C (77.2°F) |
19.6 ° C (67.3°F) |
% 81 | 10% | 7 | Sunrise:06:51 AM Sunset: 08:31 PM |
Moonrise:01:38 PM Moonset: 11:21 PM Moon Phase ( First Quarter ) |
|
| 19 August 2026 Wednesday | Sunny |
17.4 ° C (63.3°F) |
28.2 ° C (82.7°F) |
22.4 ° C (72.2°F) |
% 82 | 13% | 7 | Sunrise:06:52 AM Sunset: 08:30 PM |
Moonrise:02:47 PM Moonset: 11:57 PM Moon Phase ( First Quarter ) |
|
| 20 August 2026 Thursday | Sunny |
19.6 ° C (67.3°F) |
30 ° C (86°F) |
24.6 ° C (76.3°F) |
% 79 | 9% | 7 | Sunrise:06:53 AM Sunset: 08:28 PM |
Moonrise:03:52 PM Moonset: Does not set today Moon Phase ( First Quarter ) |
|
| 21 August 2026 Friday | Sunny |
23.7 ° C (74.7°F) |
32.6 ° C (90.6°F) |
28 ° C (82.4°F) |
% 68 | 5% | 8 | Sunrise:06:54 AM Sunset: 08:27 PM |
Moonrise:04:50 PM Moonset: 12:39 AM Moon Phase ( First Quarter ) |
|
| 22 August 2026 Saturday | Mist |
22 ° C (71.6°F) |
28.3 ° C (83°F) |
25.1 ° C (77.2°F) |
% 88 | 41% | 7 | Sunrise:06:55 AM Sunset: 08:25 PM |
Moonrise:05:41 PM Moonset: 01:29 AM Moon Phase ( Waxing Gibbous ) |
|
| 23 August 2026 Sunday | Sunny |
21.7 ° C (71.1°F) |
27.2 ° C (80.9°F) |
24.1 ° C (75.3°F) |
% 92 | 85% | 7 | Sunrise:06:56 AM Sunset: 08:24 PM |
Moonrise:06:23 PM Moonset: 02:26 AM Moon Phase ( Waxing Gibbous ) |
|
| 24 August 2026 Monday | Sunny |
23.4 ° C (74.1°F) |
29.3 ° C (84.7°F) |
26.2 ° C (79.1°F) |
% 78 | 11% | 7 | Sunrise:06:57 AM Sunset: 08:22 PM |
Moonrise:06:57 PM Moonset: 03:26 AM Moon Phase ( Waxing Gibbous ) |
|
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