Seasonality
ES seasonality — Eversource Energy
Over the last 11 years, ES's strongest month on average has been July (+4.3%) and its weakest September (-3.0%).
Average return by month
Month-by-month statistics
| Month | Avg | Median | Up % | Best | Worst | Yrs |
|---|---|---|---|---|---|---|
| Jan | +0.41% | +0.30% | 60% | +8.7% | -12.2% | 10 |
| Feb | -0.80% | -2.95% | 50% | +10.2% | -9.7% | 10 |
| Mar | +0.76% | +1.73% | 70% | +8.9% | -9.5% | 10 |
| Apr | +0.46% | +1.03% | 60% | +3.2% | -4.2% | 10 |
| May | -0.18% | +0.37% | 50% | +9.0% | -10.8% | 10 |
| Jun | -0.49% | -0.84% | 40% | +5.9% | -8.5% | 10 |
| Jul | +4.34% | +3.75% | 90% | +14.5% | -0.9% | 10 |
| Aug | +0.13% | +2.24% | 60% | +5.6% | -11.8% | 10 |
| Sep | -3.01% | -3.29% | 30% | +11.0% | -13.1% | 10 |
| Oct | +1.06% | +3.30% | 60% | +6.8% | -7.5% | 10 |
| Nov | +1.72% | +0.28% | 56% | +10.4% | -9.0% | 9 |
| Dec | +0.63% | +0.70% | 60% | +10.6% | -10.9% | 10 |
Monthly returns heat map — ES
price return, %| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2.7 | 10.2 | -9.1 | 2.0 | -3.4 | 5.9 | -0.9 | -2.0 | -8.5 | 6.8 | 1.9 | +3.7% | |
| 2025 | 0.4 | 9.2 | -1.4 | -4.2 | 9.0 | -1.8 | 3.9 | -3.1 | 11.0 | 3.8 | -9.0 | 0.2 | +17.2% |
| 2024 | -12.2 | 8.3 | 1.8 | 1.4 | -2.3 | -4.2 | 14.5 | 4.0 | 0.8 | -3.2 | -2.1 | -10.9 | -7.0% |
| 2023 | -1.8 | -8.5 | 3.9 | -0.8 | -10.8 | 2.4 | 2.0 | -11.8 | -8.9 | -7.5 | 10.4 | 3.9 | -26.4% |
| 2022 | -1.6 | -8.6 | 7.8 | -0.9 | 5.6 | -8.5 | 4.4 | 1.7 | -13.1 | -2.1 | 8.6 | 1.2 | -7.8% |
| 2021 | 1.1 | -9.2 | 8.9 | -0.4 | -5.8 | -1.2 | 7.5 | 5.2 | -9.9 | 3.8 | -3.1 | 10.6 | +5.2% |
| 2020 | 8.7 | -6.5 | -9.5 | 3.2 | 3.7 | -0.5 | 8.2 | -4.8 | -2.5 | 4.5 | 0.3 | -1.1 | +1.7% |
| 2019 | 6.7 | 0.6 | 1.6 | 1.0 | 3.0 | 2.6 | 0.1 | 5.6 | 6.7 | -2.0 | -1.3 | 2.9 | +30.8% |
| 2018 | -0.1 | -9.7 | 3.4 | 2.3 | -5.3 | 2.7 | 3.6 | 2.8 | -1.6 | 3.0 | 8.0 | -4.8 | +2.9% |
| 2017 | 0.2 | 6.0 | 0.2 | 1.1 | 4.5 | -2.2 | 0.1 | 3.6 | -4.1 | 3.6 | 3.5 | -2.6 | +14.4% |
| 2016 | 7.0 |