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Otter Tail (OTTR) Cooling Degree Days

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Cooling Degree Days

Measures how much warmer temperatures are than a standard baseline, providing an indication of weather-driven electricity demand for air conditioning and related sales.

0.00100.00200.00300.00400.00Mar 21Jun 21Sep 21Dec 21Mar 22Jun 22Sep 22Dec 22Mar 23Jun 23Sep 23Dec 23Mar 24Jun 24Sep 24Dec 24Mar 25Jun 25Sep 25Dec 25Mar 26Jun 26Sep 26
Chart Insights

Cooling demand has become less consistently intense, with recent summers generally below the stronger 2021–2023 readings, though 2026 is showing a modest rebound. This suggests weather-related electricity demand may provide some near-term support but remains too volatile to anchor earnings expectations. Otter Tail’s raised guidance is therefore more meaningfully backed by rate-base expansion, transmission investment, and growing large-load opportunities—including data centers—than by favorable cooling conditions.

OTTR Cooling Degree Days

DateCooling Degree Days
Sep 30, 2026460.00
Jun 30, 2026164.00
Mar 31, 20260.00
Dec 31, 202521.00
Sep 30, 2025326.00
Jun 30, 2025145.00
Mar 31, 20250.00
Dec 31, 20241.00
Sep 30, 2024378.00
Jun 30, 202461.00
Mar 31, 20240.00
Dec 31, 202319.00
Sep 30, 2023317.00
Jun 30, 2023254.00
Mar 31, 20230.00
Dec 31, 20221.00
Sep 30, 2022376.00
Jun 30, 2022154.00
Mar 31, 20220.00
Dec 31, 20214.00
Sep 30, 2021463.00
Jun 30, 2021237.00
Mar 31, 20210.00