diff --git a/python/grass/temporal/aggregation.py b/python/grass/temporal/aggregation.py
index 6a1bf62cd14..03a2ed13b78 100644
--- a/python/grass/temporal/aggregation.py
+++ b/python/grass/temporal/aggregation.py
@@ -113,7 +113,17 @@ def collect_map_names(sp, dbif, start, end, sampling):
 
 
 def aggregate_raster_maps(
-    inputs, base, start, end, count: int, method, register_null, dbif, offset: int = 0
+    inputs,
+    base,
+    start,
+    end,
+    count: int,
+    method,
+    register_null,
+    dbif,
+    offset: int = 0,
+    *,
+    nprocs: int = 0,
 ):
     """Aggregate a list of raster input maps with r.series
 
@@ -130,6 +140,7 @@ def aggregate_raster_maps(
                          time raster dataset, if false not
     :param dbif: The temporal database interface to use
     :param offset: Offset to be added to the map counter to create the map ids
+    :param nprocs: Number of cores to use for processing (0 means use all available cores)
     """
 
     msgr = get_tgis_message_interface()
@@ -174,6 +185,7 @@ def aggregate_raster_maps(
         if len(inputs) > 1000:
             gs.run_command(
                 "r.series",
+                nprocs=nprocs,
                 flags="z",
                 file=filename,
                 output=output,
@@ -183,6 +195,7 @@ def aggregate_raster_maps(
         else:
             gs.run_command(
                 "r.series",
+                nprocs=nprocs,
                 file=filename,
                 output=output,
                 overwrite=gs.overwrite(),
@@ -271,6 +284,7 @@ def aggregate_by_topology(
     r_series = pymod.Module(
         "r.series",
         output="spam",
+        nprocs=1,
         method=[method],
         overwrite=overwrite,
         quiet=True,
diff --git a/python/grass/temporal/univar_statistics.py b/python/grass/temporal/univar_statistics.py
index 4f70010c000..2266a902911 100755
--- a/python/grass/temporal/univar_statistics.py
+++ b/python/grass/temporal/univar_statistics.py
@@ -60,6 +60,9 @@ def compute_univar_stats(
         if stats_module.name == "r3.univar" or not registered_map_info["semantic_label"]
         else registered_map_info["semantic_label"]
     )
+    # Only r.univar, not r3.univar has nprocs parameter
+    if stats_module.name == "r.univar":
+        stats_module.inputs.nprocs = 1
 
     stats_module.inputs.map = id
     if rast_region and (stats_module.inputs.zones or stats_module.name == "r3.univar"):