Monthly means of the daily values.
Drag across the chart to zoom, double-click to reset.
For each month, over 5 years: median, low and high years (P10 to P90) and extreme values.
Mean of each complete year, as a gap to the period mean (5.24 kWh/m²/day).
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 5.45 | 5.58 | 5.65 | 5.57 | 5.54 | 5.02 | 4.49 | 4.32 | 4.95 | 5.48 | 5.18 | 5.21 | 5.20 |
| 2024 | 5.82 | 5.83 | 5.51 | 5.86 | 5.29 | 4.70 | 4.44 | 4.28 | 4.74 | 4.93 | 5.95 | 5.79 | 5.26 |
| 2023 | 5.72 | 5.38 | 5.58 | 5.82 | 5.23 | 4.71 | 4.78 | 4.70 | 5.27 | 4.93 | 5.15 | 5.71 | 5.25 |
| 2022 | 5.92 | 5.80 | 5.36 | 5.66 | 5.24 | 4.97 | 4.53 | 4.32 | 4.63 | 5.08 | 5.45 | 5.37 | 5.19 |
| 2021 | 5.84 | 5.51 | 5.34 | 5.53 | 5.43 | 5.21 | 4.34 | 4.63 | 5.03 | 5.39 | 5.62 | 5.44 | 5.28 |
| Median | 5.82 | 5.58 | 5.51 | 5.66 | 5.29 | 4.97 | 4.49 | 4.32 | 4.95 | 5.08 | 5.45 | 5.44 | |
| P10 | 5.56 | 5.44 | 5.35 | 5.55 | 5.24 | 4.70 | 4.38 | 4.30 | 4.67 | 4.93 | 5.16 | 5.27 | |
| P90 | 5.88 | 5.82 | 5.62 | 5.85 | 5.50 | 5.14 | 4.68 | 4.67 | 5.17 | 5.44 | 5.82 | 5.76 | |
| Min. | 5.45 | 5.38 | 5.34 | 5.53 | 5.23 | 4.70 | 4.34 | 4.28 | 4.63 | 4.93 | 5.15 | 5.21 | |
| Max. | 5.92 | 5.83 | 5.65 | 5.86 | 5.54 | 5.21 | 4.78 | 4.70 | 5.27 | 5.48 | 5.95 | 5.79 |
1,826 rows, 69 KB. Columns: period, value, unit, confidence level, status.
date,valeur,unite,niveau_confiance,statut 2021-01-01,6.0521,kWh/m²/jour,B,brut 2021-01-02,5.6602,kWh/m²/jour,B,brut 2021-01-03,5.2056,kWh/m²/jour,B,brutDownload the CSV
The same series, versioned, with a free key.
curl -H "Authorization: Bearer kuma_votre_cle" \ "https://api.kumascience.com/v1/series/gin_beyla_ghi_nasa_power_2021_2025?format=csv"
Read the published file directly with pandas.
import pandas as pd url = "https://kumascience.com/data/guinee/beyla/ghi_nasa_power_journalier.csv" df = pd.read_csv(url) df.head()
5 series published for this variable in Beyla. The gap compares period means, which do not always cover the same years.
| Source | Period | Step | Mean (kWh/m²/day) | Gap | 5.165.72 |
|---|---|---|---|---|---|
| NASA POWER | 1991-2020 | monthly | 5.24 | +0.1 % | |
| ERA5-Land | 2001-2020 | monthly | 5.16 | −1.5 % | |
| PVGIS-SARAH-3 | 2021-2023 | monthly | 5.72 | +9.2 % | |
| ERA5-Land | 2021-2025 | daily | 5.25 | +0.2 % | |
| NASA POWER this record | 2021-2025 | daily | 5.24 | reference |
Distribution
Cross-source
Mean relative deviation NASA POWER − SARAH-3 ICDR:
-8.34% (σ = 2.76%, 36 months). The Kuma quantity ecart_relatif_referentiel embodies this cross-check (layer B).
Kuma Science (2026). Global horizontal irradiation, Beyla (Guinea), 2021-2025. NASA POWER series, Guinea national energy data reference. DOI 10.5281/zenodo.21051755. https://kumascience.com/en/donnees/gin_beyla_ghi_nasa_power_2021_2025
@misc{kuma_gin_beyla_ghi_nasa_power_2021_2025,
author = {{Kuma Science}},
title = {Global horizontal irradiation, Beyla (Guinea), 2021-2025},
year = {2026},
howpublished = {NASA POWER series},
doi = {10.5281/zenodo.21051755},
url = {https://kumascience.com/en/donnees/gin_beyla_ghi_nasa_power_2021_2025},
note = {License CC-BY 4.0}
}TY - DATA AU - Kuma Science TI - Global horizontal irradiation, Beyla (Guinea), 2021-2025 PY - 2026 PB - Kuma Science DO - 10.5281/zenodo.21051755 UR - https://kumascience.com/en/donnees/gin_beyla_ghi_nasa_power_2021_2025 N1 - NASA POWER ER -
Also cite the primary source, whose licence applies to the published values.
Astuce pratique · Pour citer cette fiche dans un rapport BE ou un livrable client, sélectionnez le bloc ci-dessus puis copiez-collez. Le slug de la série (le code présent dans l'URL) garantit la reproductibilité : la même URL pointera vers la même série, même après mises à jour des données amont (l'historique versionné côté Data Core est préservé).
Besoin d'aller plus loin sur cette série ? Le cabinet Kuma accompagne bureaux d'études, bailleurs et porteurs de projet sur l'ingénierie énergétique appliquée · audit, dimensionnement PV, conseil stratégique.