Ontario Weather Forecast 15 Days, Weather in Ontario Today
Current weather conditions and 15 day weather forecast for Ontario, South Dakota, 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 Ontario
| 22 May 2026 Friday 12 ° C / 53.6°F  Moderate rain |
Feels Like : 11 ° C / 51.9°F Humidity : % 97 Pressure : 1007 mb Wind Speed : 13.7 kmph / 8.5 miles from SSW  Visibility : 10 km Precipitation (rainfall) : 3.97 mm Cloud (%) : 100 |
15 day weather forecast for Ontario, SD, USA
Weather Forecast for next 15 Days for Ontario 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 Ontario, South Dakota 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 22 May 2026 Friday | Moderate rain |
8.9 ° C (48°F) |
13.4 ° C (56.1°F) |
11.6 ° C (52.8°F) |
% 88 | 81% | 4 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 23 May 2026 Saturday |  Patchy rain nearby |
7.4 ° C (45.3°F) |
23 ° C (73.5°F) |
14.7 ° C (58.5°F) |
% 67 | 77% | 7.2 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 24 May 2026 Sunday | Patchy rain nearby |
11.1 ° C (52°F) |
27.8 ° C (82.1°F) |
19.3 ° C (66.7°F) |
% 61 | 79% | 7.7 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 25 May 2026 Monday |  Sunny |
16.2 ° C (61.1°F) |
32.3 ° C (90.1°F) |
24.2 ° C (75.6°F) |
% 45 | 0% | 7.6 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 26 May 2026 Tuesday | Patchy rain nearby |
18.4 ° C (65.2°F) |
32.2 ° C (90°F) |
24.9 ° C (76.8°F) |
% 57 | 72% | 0.2 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 27 May 2026 Wednesday | Sunny |
18.5 ° C (65.3°F) |
31.4 ° C (88.6°F) |
24.2 ° C (75.6°F) |
% 55 | 0% | 6 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 28 May 2026 Thursday | Sunny |
18.6 ° C (65.4°F) |
29.4 ° C (84.9°F) |
23.8 ° C (74.9°F) |
% 64 | 0% | 6 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 29 May 2026 Friday | Sunny |
18.4 ° C (65.1°F) |
29 ° C (84.1°F) |
23.6 ° C (74.5°F) |
% 58 | 0% | 6 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 30 May 2026 Saturday | Sunny |
17.1 ° C (62.8°F) |
27.3 ° C (81.1°F) |
22 ° C (71.7°F) |
% 55 | 0% | 6 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 31 May 2026 Sunday | Sunny |
17.2 ° C (62.9°F) |
30.8 ° C (87.5°F) |
23.4 ° C (74.1°F) |
% 60 | 0% | 6 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 01 June 2026 Monday | Sunny |
18.1 ° C (64.5°F) |
32.7 ° C (90.9°F) |
25 ° C (77.1°F) |
% 51 | 0% | 7 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 02 June 2026 Tuesday |  Partly Cloudy |
18.3 ° C (65°F) |
29.4 ° C (84.8°F) |
23 ° C (73.3°F) |
% 69 | 0% | 6 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 03 June 2026 Wednesday | Patchy rain nearby |
14.4 ° C (58°F) |
25.7 ° C (78.3°F) |
19.6 ° C (67.3°F) |
% 50 | 63% | 4 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
| 04 June 2026 Thursday | Sunny |
15.1 ° C (59.1°F) |
27.2 ° C (81°F) |
20.8 ° C (69.4°F) |
% 44 | 0% | 6 | Sunrise:06:00 AM Sunset: 09:05 PM |
Moonrise:11:50 AM Moonset: 01:56 AM Moon Phase ( First Quarter ) |
|
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